What Are the Basics of Mobile Home Plumbing?

Mobile home plumbing is generally different than standard construction.
Some mobile homes may have one shut-off valve for the entire property, rathern than separate valves at locations such as toilets.
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  • Written By: Sherry Holetzky
  • Edited By: Bronwyn Harris
  • Last Modified Date: 10 July 2014
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Perhaps the most important thing to keep in mind when addressing the basics of mobile home plumbing is the fact that most mobile home fixtures and hardware can be quite different from the options used in standard construction. The building code is also different, so if a homeowner plans to tackle plumbing projects, he or she should check for local codes that may be applicable. In general, the codes seem to be a bit more lax, but it is still prudent to make sure the work is up to code.

Since it can be difficult to find a plumber who can or will work on mobile home plumbing in some areas, it is a good idea to become familiar with the basics. There are books and websites available for the do-it-yourself homeowner. For those who cannot find a plumber and are not confident in working on plumbing, the mobile home manufacturer or a repair company that specializes in mobile homes may be able to provide help.

Another issue, since the fittings and other mobile home plumbing parts tend to be quite different, is that hardware stores and plumbing supply outlets in many areas do not always keep plumbing parts in stock. It depends on the location. If there are many mobile homes in the area, one may have better luck locating specialty parts. Otherwise, those parts or any specialty tools that are required to repair, replace, maintain, or install mobile home plumbing may have to be specially ordered.


Aside from the fixtures and fittings, some of the features of mobile home plumbing are different as well. Instead of having several water shut-off valves throughout the home, such as at sinks and toilets, there may only be one or two shut-off valves for the entire home. One is generally located externally, near the hose spigot. A second, if present, may be located near the water heater. This means the water will have to be turned off throughout the home, or most of the home, while plumbing projects are being done.

While it may be possible to install shut-off valves throughout the home, the parts needed may have to be specially ordered and some parts may have to be changed. The space in which one has to work is also smaller. One may also be required to crawl around on the ground underneath the mobile home, as there is no basement from which to access pipes.

Speaking of pipes, this brings up another important consideration when dealing with mobile home plumbing. While in some older mobile homes piping may be made of copper of other materials, plastic is generally used now. Mobile home pipes must be also protected in cold weather. Even if the mobile home has good underpinning, pipes can freeze. There is pipe foam, or pipe insulation available, as well as heat tape and other protective products that can be ordered for this purpose.


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