Mobil Home Drains – Introduction

Manufactured home drains

Drain lines are usually made from 3″ or 4″ black ABS pipe, are supposed to be supported with plumbers strap every 4′ and extend from below the bathroom(s) to where the sewer line goes into the ground. They are supposed to be sloped at 1/4″ per foot. Since many homes have bathrooms on opposite ends of the house, the sewer lines may be 60′ or longer.

When the home is shipped from the factory it has the drain lines complete to where they extend through the belly of the home and the rest of the lines are installed by the setup crew. I have included a more complete description of the setup process but understand that it is frequently done by a contract crew arranged by the dealer.

For the setup crew, time is money, no one will look under the house once it is skirted anyhow, and they are already late for the next job. Thus, pipe joints may be slid together, not glued. Inadequate strapping, and improperly sloped lines are also common.

I have been called to homes where an improperly supported line has sagged and gradually filled with solids until it finally stopped up completely. The heavier the line gets, the more it sags, until it won’t drain anymore. The first anyone notices there is a problem may be years after the installation when someone is taking a shower, someone flushes a toilet in the other bathroom and the wash machine happens to empty, all at the same time. It can make for quit a mess.

I was once called to repair a line after the homeowner snaked a drain and then noticed water was running into the street from under the house whenever they used the washer. The pressure from forcing the snake around bends was enough to push apart poorly or unglued fittings.

Troubleshooting Drains
Drains are really very simple; water runs downhill so if it won’t drain, there is something blocking its path. The trick is to efficiently find out where the blockage is and then determine the easiest way to clear it. This requires some understanding of how the drain lines are laid out under your home.

Each toilet, sink tub/shower or wash machine has a drain line that goes through a trap and then down under the floor where it is combined with other nearby lines.

Thus the drain lines from a bathroom sink, toilet, and tub come together under the house and continue on to the main line. Plugged lines are most frequent before or at the traps. This isn’t surprising since the lines there have the smallest diameter and the most bends.

In kitchens, grease buildup is the usual problem and in bathrooms it’s hair. Garbage disposals are always trouble makers.

First ask yourself if just one drain is a problem of if others near it aren’t working either.

For example, if the toilet won’t flush properly but the tub next to it drains normally, the problem has to be somewhere between the toilet and where the toilet and tub lines connect; most likely in the toilet itself.

If none of the drains in an area work, but other drains in the house are OK then the problem must be in the line after it comes together under the room, but before it goes into the main line under the house.

If none of the drains in the house work, the problem must be in the main line.

Frozen drains can be a problem in cold conditions under special circumstances. Normally, the volume of water from showers, toilets etc. and the fact that drain lines empty quickly means that ice buildup is not a problem, even in severe conditions. Therefore, drain lines are not normally insulated.

However, in VERY cold weather when you let a faucet drip slowly to keep water lines from freezing or if you are away from home for a few days (you turned the thermostat down to save on the heating bill; right?) and have a dripping faucet the ice may accumulate to the point of blocking the line. It is not fun to unthaw frozen sewer lines!

{ 64 comments… read them below}
having trouble with drains separated drains from sewer ran separate lines from kitchen sink bathroom lavatory and washing machine drain then bathtub this is a mobile home know everytime my wife washes clothes puts water in bathtub and lavatory could you give me some suggestion on what to do i put vents on each of them but just wandering what to do next.
I’m not sure I am understanding your question very well.
The approach I use for drain problems is to think about where the problem must be. If only one place, such as a sink backs up, the drain line must be blocked between that point and where ever the line comes together with another drain. If, for example, both the bathroom sink and tub won’t drain the blockage must be after those lines come together. If bathtubs back up when the wash machine empties the line must be clocked downstream from the was machine.
Running a snake though the line and/or cleaning traps should fix the problem, but if you know where the problem is you have a better idea of what kind and size of snake to use. You also have a better idea of how far in you have to go to reach the blockage.
For readers who haven’t had the “pleasure” of snaking a drain line this is important because it’s hard work and you don’t want to do more work than you have to or, even worse, not go far enough and have to do it again.
If you can afford it, or if you can split the cost with neighbors or family, you can buy a powered snake for $200-300. My home suffers from some really “creative” plumbing and I have one line that clogs ever 4-5 months. The first time it did that my son and I spent 3 hours working a 50′ snake into the line. Lots of sweat, some blood, and constant effort to protect the tub and carpet from rust and nasty substances. Worst of all, we didn’t get in far enough to clear the blockage!
I ended up calling a plumber who used his power snake to put 100′ feet of cable down the drain, which fixed the problem. $165 amounts to quite a discount on a powered snake of my own.
The next time it happened I bought the power snake and it took 15 minutes with no sweat and no blood to run all the line in and clear the blockage. I bought a small, flat dolly ($20) to set the tool on so I don’t even have to carry it. It lives in the corner of the closet and I can roll it out when needed.

Paul i have a mobile home where the tub will not drain but if you turn on the garbage disposal the water in the tub will move around i tried the snake small one but didnt get far at all with it. Only 1 bathroom in mobile home. And the bathroom and kitchen are on opposite ends of trailer. Any ideas? Thanks for any suggestions
Hi Ryan,
Go to Amazon and do a search for “Hair Drain Clog Remover”. Those plastic strips with barbs on them will pull hair out of the drain. Hair is the usual problem on bathrooms.

We have a mobile home that has two full bathrooms. Both of the toilets are not working at all. The sinks in the house and the showers and tubs are all working fine. The toilets are completely stopped up though and they will not drain. Each bathroom is located on a different side of the house too. I’m not sure what to do. We really don’t have the money to call a plumber so if there is anything we can do ourselves we’d rather go that route. Any advice would be helpful.
Are the bathtubs and sinks draining properly? Did both baths stop working at the same time? Did grandchildren visit about the time they quit working?
In brief, if a short snake doesn’t fix the problem it is not that hard to pull the toilet so you can look for obstructions deep in the toilet and/or the drain line under it.
About the grandkids comment: I had one where they dropped a toothbrush into the toilet. It floated up out of sight, and the snake went right past it. It worked fine after snaking until the next time someone tried to flush solids. Then it clogged again. Took me three trips to figure it out. More of that easy money in the repair business

I have a mini home that I think the main drain is blocked as all sinks,tubs and toilets are backing up when something else is used. The block is not complete as it slowly drains out. I have tried a pipe snake to try and clear it through but to no avail. Is there an access point under the mini home where I can try to snake the blockage out? If so where is it located (I am guessing probably in the middle). I am asking as I have 3 feet of snow around the skirting and do not want to have to dig in multiple locations or have to crawl the length of the home. Any advice would be appreciated. Thanks
Usually there is a cleanout where the drain line comes out from under the house. I would be looking for a large (2″ ?) plug that could be unscrewed. That would give you access to run a snake back toward the house and/or toward the street.
Be careful if you work back into the house. You would not want to get to far
Good luck.

i have a mobile home. I have 2 bathrooms. One of the bathrooms over flowed when the toilet was flush, when trying to plundge it water came out of the sink as well as the bath tub. I went to look in the other bathroom and there was water leaking all over the floor from the bottom of the toilet. I called someone to come check out my septic tank to see if it was full and thats why there was no drainage but that wasnt the case. I went out and got a 50 ft snake and went in each toilet after removing them still found nothing and no water flow to the septic pipe where it drains. My husband tried crawling under the house but there is no room under there for him to even get around and try to find the lines that crossed to try to snake those. We are at a pause and have no idea what to do next, this is very frustrating. Any advice? plumbers are soo expensive these days! please email me as soon as you can, thanks!
If you look where the main drain line comes out from under the house one it’s way to the street there is usually a cleanout there. I would expect to see a large, plastic nut that can be unscrewed. That will let you run the snake back towards the house and also out to your septic. Hopefully that should take care of the problem.

well my husband got under the house and snaked those pipes as well and still no flow of water coming out of the septic pipe…..unfortunately I think we’ve done all the steps and have to call a plumber do you have an idea of what it could be?
Water runs down hill. So it has to be blocked somewhere. I am assuming by plumber you mean someone like Rotorooter that has more powerful drain augers?
Please let me know what you find.
yeah we tried calling them but havent herd a response, i guess home depot in our area has tool rentals so we are going to try to rent something more powerful, crossing fingers and hope to god it works! but thanks for getting back to me so fast this has been an experience and anything helps at this point! thanks

just an update…. the tool we rented from home depot didnt help anymore then what we were doing, so i bought this high quality chemical i put down the toilets over night ate whatever the problem was, after flushing them a few times the next day, water started flying right out of the septic pipe, after 5 days our problem is FIXED!!! thanks for the advice.

We have a single wide mobile home and for the past 2 days there is an overwhelming odor coming from the bathroom that has made it’s way all through the house…all the drains, and toliet work…we did come home earlier this week to discover that the underpinning was removed from one section of the house..that is where the bathroom husband just put it back and we never thought of it until now..what could be the issue?
My usual answer is that you have had a failure of the under sink vent. Mobile home drains don’t usually vent through the roof. Instead they have a vent under the sink that lets air into the drain line to prevent the trap from having the water siphoned out of it.
In this case it seems suspicious that you should have the underpinning issue at the same time. I think it would be worth looking around under the home to see if you can spot any damage.
Thank you so much for your help! Smell is gone!

I just dropped my ring down the drain. I’m devastated! Is there anyway i might be able to get it back?
Don’t run more water down the drain.
Clean out the area under the sink and put a pan under the drain line to catch water. Undo the threaded ends of the trap (The U shaped part of the drain line), pour out the water and look for the ring.
Good luck.

Help we have been dealing with this for over a week. I live in a mobile home and the drains in the bathroom by my kids room were slow to drain the the bath tub filled up with sewage (not a good thing for my kids baths) whenever I turn on the water to any sink toilet or washer the toilet in their bathroom bubbles. we have a sewer line in the mobile home park so we dont have a septic tank. we asked the owners to help fix this but 2 days later a tornado came through so its been crazy. now i not only have it backed up in my kids bathroom but mine as well which is on the opposite side of the house and the washer drain is starting to over flow all with sewage. I have no idea what I can do other then a plumper that I cant afford. please help
It sounds like the main drain line is blocked since all the drains in the house are backing up. Someone is going to have to run a snake into the line to clear it. It sounds like might be easiest to come from the cleanout, which should be near where the drain line comes out from under the house.
Roto Rooter or a company like that should be cheaper than an actual plumber. Another reader in a different post mentioned she had been able to rent a drain auger from Home Depot.l
Good luck with it.

Hey Paul… I have a problem with a bathroom we just did some repairs on. we had a leaking bath tub that rotted the floor out… so I replaced the floor and toilet one weekend and it worked with no issues. then I replaced the tub/shower and had to re-do the plumbing going to the tub, becaus ethe new tub had an overflow drain. once that was all replaced, I turned the water on in the tub and started having bubbles come up into the toilet and now the toilet wil not flush. the water rises in the bowl but will not go down( it does go down after a few mins) I hooked up the vent when i replaced all the plumbing…so im kinda lost……
Something doesn’t quite add up. Is there any way you could have dropped something down the drain while you were working on it? Maybe try running a snake into the drains and see if that helps.

Hi Paul,
Similar problem as those mentioned above. I live in a mobile home with 2 bathrooms, a kitchen sink, washer and dishwasher. We’re having slow drainage problems at different times. It’s very unusual. Here’s an example: In the master bath, we flush the toliet and water fills to the top of the bowl, so we plunge and water bubbles from the sink and shower drain. After a while, (several minutes, greater than 10) the water receeds. In the kitchen, the sink drains fine, as does the dishwasher. On the other end of the trailer, (bathroom 2) we have a similar problem, flush the toliet, water to the top of the bowl, plunge and the bathroom sink burps, and pukes a little water, followed by the shower filling with water. And every other Tuesday, we’ll plunge bathroom two, and bathroom one fills up. It’s a complete disaster. In attempt to fix, I took the return caps off of both sinks (both bathrooms, and ran a cheap Wal-Mart 25′ snake down the return pipes in attempt to clear any blockage, no such luck.)
Water runs downhill. That’s hard to remember in a situation like yours, but drains are nothing but hollow tubes that slope downhill. There has to be a blockage at some point(s).
Do you have kids or grand kids that have put something down the toilet(s)? I worked on one job where one of the grand kids had dropped a toothbrush down the toilet. It was far enough up into the toilet I couldn’t see it, the snake went right past it, and it didn’t drop down when I pulled the snake back. The toilet would always flush fine after I snaked it, but then I would get the call that is was plugged up again. Two trips back and said it’s time for a new toilet. The owner didn’t like the price but thought of adding wads of toilet paper to test the flush. That made it clog of course and after a few tries he spotted the toothbrush.
A couple of years later I am at another job with the same problem. Snake the toilet and it flushes. Toss in some TP and it clogs. This time I pull the toilet, take it outside & flush it from the bottom with a garden hose. Nothing comes out and I can’t see any problems at either end. I install it again and it clogs! This owner takes pity on me and tells me to buy a new toilet. I do, and it works fine. I still can’t imagine what could be causing the problem so I take the old toilet outside and bang it with a hammer. There in the shattered ceramic I see the cap from a fancy Avon product bottle. It’s about 3″ wide and triangular in shape. Obviously, it got into the toilet, no one noticed, it filled with solids while pointed tip down and the weight of water and stuff wedged it in place.
You might also want to crawl under your home, trace the drain lines and look for problems. Sometimes drain lines don’t get connected or supported properly. I have seen them with serious dips that collected solids and eventually caused problems.
Another idea would be to have a professional drain cleaning service try to clear the lines with a more powerful snake. You might be able to rent one of those machines at Home Depot or Lowes and save some money by doing it yourself. I would try coming in from the street end (carefully).
Please let me know what you eventually find.

Still looking for answers. And, did some self learning as well. (water isnt the only thing that flows down hill, vomit) Pulled the toliet completely off of the wax ring in the master bathroom, roto’ed it, no clogs.
When you say you’re snaking the toliet, how do you go about it. My roto doesn’t go in through the bowl, and I don’t think that is correct anyway? And, what diameter is your roto bit and chain.
Also, crawled under the trailer, and found the main drain pipe, but there is a visquine, or some kind of tarp protecting the pipes draining from inside of the trailer, with insulation in between, (don’t want to get into that mess). Anyway, it seems things are getting worse, as both bathrooms, are not draining now. However, the sink in the kitchen and dishwasher are draining fine. So I image the clog is where, the 3 elements in both bathrooms come together?
Are the drains for sink, tub, and toliet all in the same place under the trailer?
Still fightin’
Hi Paul,
I never did respond with my answer! As it turns out, the main drain pipe, which goes into the ground was clogged. I found out that the owner before me had a cat and dumped cat litter into the drain. We cut the main line going into the ground and literally had to scoop the mess out. That cleared the line and all of the “muck” behind it. We also found that the pipe containing the “muck” was LEVEL and not angled for good flow. We put the new pipe at an angle for supreme drainage.
Thanks for your help!

I have a kitchen sink drain pipe under my mobile home that is leaking water when the sink is used. It’s running onto the dirt below the trailer. I’ll try to get it fixed as soon as possible, but was wondering if it may do any damage in the mean time?
Does it drain directly onto the ground of is is draining through a layer of insulation? Soaked insulation gets very heavy and will tear up the bottom. I always found that a quick look for dangling insulation under a used home was an almost certain indicator of past plumbing problems. It makes it easy for mice and other unwelcome visitors to get into the open area (Plenum) under the floor.
If the house is supported by piers and the water softens the ground under them you can loose your level.

Linda Moody
I have a double wide mobile home and have hugh issues with septic odor in the master bathroom. It rarely smells when its dry, but when it rains and especially when it gets cold the smell is REALLY bad. I’ve had all kinds of suggestions for fixing this but have had no success. The stink pipe (vents) are not plugged so thats not the problem. The last suggestion I had was to install separate vents on each bathroom commode…the manufacturer tells me that both commodes are vented thru the shower, can the be my problem? I’d hate to spend a big amount on a plumber only to still have the odor. Please, please give me your advise on what I can do to fix this problem, winter is coming and I can’t bear the thought of my house smelling like a sewer again. The summer has been very dry and the odor hasn’t been much of an issue, but I know that will soon change. I eagerly await your suggestion and am willing to try most anything.
Thank you in advance,
I can imagine that if you are on a septic system excess water might drain into it and force sewer gas back toward the house. Most mobile mobile drains are not vented like site built homes. They use vent caps to prevent sever gas from getting into the house. These caps have a spring loaded seal that lets air into the line when water is going down the drain to prevent siphoning. It then closes to seal the opening. If one of these is stuck either open or closed you will get sewer gas in the house. Look under the vanity and see if you see a stub of black pipe that is a dead end. The vent cap should be on the end of it.

dear paul for a few weeks kids complaining of odor in room small flies also appeared in bathroom we just redid whole bathroom floor few weeks ago, so b/f goes under trailer and notices pipe is broke that connects to toilet he cleaned up some of our messes wants to put something down b4 calling a plumber should this be sand???? and how much to fix the 3 way connector pipe? thankyou
Sand is probably as good as anything. Prices for repair work are different in different parts of the country. You will have to check around in your area.

help help help….over a year of sewer smell! I can’t take it anymore! we tore the floor out thinking some child was in potty training stages and perhaps urine was the fault. Nope wood was spotless. We pulled out the toilet changed the seal cleaned toilet changed seat. Nope still not the answer. Went under house, all is dry and looks proper. Smell comes from shower drain. Finally pinpointed it to shower drain. If boys did not shower I would not get the strong odor all day. It would be a tad weaker in smell but still obvious we have a problem! So I call cavco

they say well it’s been 3 years and you are over you’re warranty. Please see if you have a p- trap. Honestly duh! we know we have one. Husband snaked the vent top and bottom changed the vent under the sink and made a tad longer connection to under bathtub drain so perhaps sewer smell has more chance to burp upwards. Nope all that work and still no answers. Desperate and cavco is not

sorry something is wrong with the site it will not allow me to type anymore. anyhow cavco is not returning calls and I am desperate. like you said it could take a year or 3 before issues come forward. My husband is baffled and we have no clue. He is a steamfitter works with plumbing,pipes and all and the house looks perfect from underneath. I yell at the boys to SHUT the bathroom door after use so the fumes do not enter throughout the house! we have a 1600 sq ft house. The only problem is the one bathroom, no drainage issues ever..any ideas please help! I have become depressed, irritable, eyes are always watery, and I know the fumes that I breath in daily are causing this…..
Does it start to smell while the shower is being used, or afterwards? If afterwards, what if you poured a pint or so of water down the shower drain. That should be enough to fill the trap if it had siphoned itself dry, without siphoning itself dry again. If that stops the smell there has to be a venting problem.

I have a single wide. I’ve lived here for 4 years The problem I’m having is the water in the main bathtub drains out of the tub but it sits in the drain. It’s never free of water. Now an odor is coming up through the drain. What needs to be done? And is there anything I can do to kill the smell? Thanks
I don’t understand. Drains hold water in a trap and that is what prevents sewer gas from coming back into the home. In that sense the water sits in the drain. However, since it is replaced whenever more water goes down the drain it shouldn’t smell.

This is not a clogged drain question.
My problem is in the guest shower of my mobile home. When someone is taking a shower, water seems to run down the front of the shower and runs to the floor. By the time you get out the shower, there is a big puddle on water on the floor in the corner where the floor and tub meet. Is there some sort of blocker that can be attached so that the water goes in the tub and not on the floor.
A friend had this problem in some of his rentals. He found a plastic self-stick triangle that he could put in the corner to prevent this. I haven’t tried to find them myself, but would start at Walmart, Lowes, or Home Depot.

My master stand up shower in my 1998 Oakwood mobile home is leaking, is there a shut off valve to the shower? or do i need to shut off my entire house? Or can I block the line off?
It depends. Sometimes there is, often there is not. IF there isn’t you might consider buying one and putting it on the line now so it will be available in the case of future repairs. It’s much less stressful doing a repair when you know the people living in the house can at least use the bathroom while you are working.

Having a very cold winter wonderland n Wisconsin with -40 F windchill and -18 tempature. We have a double wide vacation manufactured or mobile home. We leave the thermostat at 50 while away. This year the drain pipe froze. When I flushed the toilet the water bubbled out of the tub and shower. Both bathrooms had issues. We took off the septic cover and found about 1 &half of ice. My husband broke thru the ice barrier we add hot water till it was melted and added ridX. Then add anti freeze to all the plumbing for revs and homes.
Turned up the heat and left because we work tomorrow.
is there anything else we can do? We think the drain is frozen.
New with septics… what would be the next step if this doesnt work? It is skirted and has a 3/4 insulation and sided on outside walls.
The question will be where the line froze. Since both bathrooms had problems the line is/was frozen farther down the line, probably in the main line. The assumption with drains is that the water quickly drains from the lines and into the septic before it has a chance to freeze. I have heard of cases where a dripping faucet creates a problem because the low volume isn’t enough to warm the line and ice gradually builds up until the line is blocked. I have also seen cases where the line was not supported properly and water/solids accumulated in a low spot and caused problems.
If what you have tried doesn’t work I would imagine some “lucky” soul will have to crawl under the home with a blow dryer, tap on the line to find where the pipe sounds full, and melt back from there. Of course, if it has frozen hard enough to split the line finding the problem will be easy.:) Please don’t even think about using a torch.

What is the best way to insulate the trap in my washing machine drain. It is under the home and freezes frequently
I’m not sure there is a “Best” way. It would depend on how severe your weather is, your skills, your budget, etc. Some ideas that come to mind include:
Heat Tape
Spray foam insulation
A small Styrofoam cooler fastened tightly to the belly of the home
Build a small wooden box, fill it with insulation, and fasten to the belly

I live in a mobile home in Ontario Canada and it has been very very cold this winter, My toilet and bathroom sink drain fine, but my tub, kitchen sink and washer will not drain. I do have vent stacks that go to the roof. I have just been waiting for things to melt. Any ideas that could help me?
Set your thermostat higher.
Keep the cabinet doors under the sink open
Consider pointing a radiant heater at the floor under the tub & washer

We have had several days of below zero temps. Now the bathroom shower and toilet at far far end of the house will not drain. Could this be frozen sewer pipes ?
Yes. It is especially likely if there is water dripping slowly somewhere. Drain lines handle low temperatures best when a large amount of water goes down the drain and then the line drains dry before it can freeze. If you have a low spot where the line wasn’t suspended properly and/or a leaky faucet, the small amounts of water freeze and over time can build up and block the line.
It might be worth crawling under the house with a hair dryer, looking for obvious trouble spots, and trying to thaw things. Since it is only the far end having the problem you shouldn’t have to look as hard to find the problem. It has to be between the farthest back working drain and the far end of the house.
Good luck.

donld slagle
My mobile home has 2 full baths,one at each end. The one works fine. One in master bathroom is giving me fits. If you run water in the sink it fills up the toilet. Toilet will drain slowly over several hours. Any help would be appreciated.
Something is blocking the line after the toilet & sink drains come together to go into the main line.
I would be wondering if something like a toothbrush went down the toilet, got stuck crosswise and “stuff” is hanging up and blocking the line. I once found the cap to an Avon bottle down there. Grand children sometimes leave “gifts”.
I would guess the problem is not to far down the line so I would see if a cheap drain auger would fix your problem.
Go to and search for “dreain auger” to see what is available. It will probably be cheaper to actually buy one locally. Price will be proportional to power so I would start cheap and work up as needed.
These blockages can be surprisingly hard to find. That Avon cap was invisible from the top AND bottom of the toilet. I could not feel anything when I ran my auger in. After wasting way to much time I replaced the toilet. Then I got a hammer and shattered the old one. Its the kind of problem which makes reapir charges high.

Help!!! We have a year old 2800 sq double wide. One bathroom stinks terribly! We thought the smell was coming from vents . We had all vents and ducts cleaned out out and the smell is still there. The smell is urine smell not sewer. Does nyone have any idea what could be causing the smell ?

I have a problem my mother bathroom toilet floor underneath give out and and bath tub cracking at the drain. Then it happened the toilets and tub slowly drains but toilets won’t flush and can’t wash clothes and do dishes without water fill up my mom toilet or tub. We snaked everything and no use
“We snaked everything…” Water always runs downhill unless something is blocking it. Either your snake wasn’t aggressive enough to break up the blockage or the problem is farther down the line than you were able to reach. Tree roots come to mind. You didn’t say if you are on city sewer or a septic.
Is there a cleanout or place where the main line goes underground that you could open up to see if it drains properly to that point? If it isn’t draining properly there you might try going up the line from the cleanout/opening and seeing if that does anything. If the line isn’t draining past that point you have to start thinking tree roots in the line to the street or roots or other issues with the septic.
I know its painful to write the check, but at some point you might have to call Roto-Rooter or a service like them. They have powered augers with cutting tips that will clear out anything.

I have read through all the mail and replies so I apologize if mine is redundant. Only my sink drain is clogged. When I plunged it, it pulled up a swill of mud and dirt (from the ground?) and still won’t drain. My sink drain runs probably 30 feet before it meets any of the other toilet drains, then ends in the ground. I am in a city park so have no septic or other holding areas. The line from the sink doesn’t go near the ground or in it so where is the dirt coming from if it isn’t showing up in any of the other drains? How do I fix it?

Danielle Toombs
We just bought a mobile home and everyday our toilet backs into our tub and tub into our toilet along with our tub filling up with washer drainage. My fiance has looked under the mobile home and it has leakage out of the pipes and wet ground (smells) we are tring to find out who we would call to fix it or where to even start with fixing it ourselves or myself since he just had back surgery and cannot crawl under.
Hi Danielle,
It sounds like you have two problems going on.
Think of your drains as a long pipe with connections coming from all the individual drains. (Reality is less simple). Imagine there is a toilet at the far end of the line, the tub a few feet closer, and the laundry room closer still. If there is a problem between the tub and the laundry, water will back up into the tub when you flush the toilet. If there is a problem closer than the laundry and your wash machine forces water into the drain under pressure, it will back up into the tub and possibly the toilet.
Did that make sense?
I would start with the water leaking under the home. Some lucky person (you it sounds like) will get to crawl under there and look for a broken connection or other issue. Depending on what you find it may be helpful to run a snake into the line from underneath to try and clear any clogs. You may also want to run the snake down from the top. When the line is clear and the pipes are clear and dry you can repair the break(s).
If you elect to hire the work done, make sure you get someone with mobile home repair experience.
Good luck.

I just moved into a double wide mobile home ( 20 years old??)
My kitchen sink backs up and drains very slowly.
Everything else seems to work fine. My dad came over and removed and snaked the drain with a drill snake, about 15 ft. The snake pulled up very little. it did not work. I have very limited funds due to divorce. What should I try?
Hi Paula,
15′ should have had the snake well into the main drain line. If none of the other drains have problems, that suggests the problem is closer to the sink.
It sounds like he opened the drain trap to put the snake in. Is there any chance the problem could actually be closer to the sink? For example, the disposal outlet or the pipe from the disposal to the drain?
I would love to hear what you finally find.

Hello Mobile Home Doctor!!
I went through and read many of these questions and your replies. Thanks as they did answer my major question, clogged pipe.
My question is why should I have to snake my line every 2 months? This started about 7 months ago. It was only the kitchen. NOW all water drainage is coming up into my bathtub and won’t drain. Toilet won’t flush and plunging doesn’t help. I plugged the bathtub drain while my washer spun out and it overflowed the toilet bowl. (Of course I was ready for a disaster) But why do u suppose I need to snake my lines so often?? Thanks for your help.
Hi Sue,
Drain lines have very specific requirements for proper slope if they are to work properly. 1/4″ per foot I believe is the standard.
If they slope to much the water drains faster than the solids which will lead to clogs.
Installers are usually paid by the job and few homeowners are going to crawl under their house to check the work. So, pipes are not always properly supported. I would guess you have a low spot in your main line that gradually fills up and clogs the line.

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