How to Do Plumbing in a Mobile Home

how to do plumbing in a mobile home

If you’re wondering how to do plumbing in a mobile home, there are a few things you need to know. First, insulated pipes will prevent the water in your house from freezing. Mobile homes are typically moved to a different settlement location, so rigid pipes will likely crack or be loosely connected. You will need to determine where leaks are coming from and then make repairs. This guide will walk you through the process step-by-step.


Using CPVC for plumbing in a mobile house has its advantages and disadvantages. For starters, it’s less expensive than copper pipes. That’s important to consider because mobile homes aren’t built like site-built homes are, so the smaller tube isn’t as significant of a deal breaker. CPVC and PEX are more common for supply lines in mobile homes, and both are suitable for hot and cold water lines. While incoming copper pipes can last slightly longer than plastic ones, they’re less expensive to install.

CPVC is not as tough as copper or galvanized steel. For this reason, it’s essential to protect the tubing with steel nail plates. Unlike copper, CPVC pipes will require more support than other pipe types, so it’s recommended that long runs of CPVC tubing be spaced farther from the framing to avoid potential leaks. When installing CPVC pipe, make sure it’s clean and dry. Also, some codes require a primer, which is purple.


This video will demonstrate plumbing in a mobile home using the PEX pipe. Working in areas with plenty of free space is best, as working in a tight spot can make crimping difficult. However, the video should provide a basic understanding of the process. For example, the video shows a family plumbing an outdoor faucet. PEX requires a manifold to connect the pipes, which is a little more complicated but is not impossible.

A PEX supply can run the length of the home and can branch off with 1/2″ PEX. Unlike copper, PEX will expand more, so you should install it in loops to make room for expansion and contraction. This method also makes it easy to remove excess tubing, which isn’t necessary when working with PEX. For this reason, it’s essential to use oversize holes and avoid using metal straps.


The most common issue in older manufactured homes is the use of polybutylene piping. The reason is that the material freezes over quickly. Since this piping is typically used underground, this problem is not usually a serious concern. To avoid this problem, you can use particle board underlayment, which absorbs water. If polybutylene is used, however, you will want to find an alternative material for the plumbing system.

Most manufactured homes use a combination of metal and plastic pipes in their plumbing. Modern mobile homes use polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), and PEX pipes. Copper piping is rare for supply lines. Though plumbing systems in mobile homes are much better than in older manufactured homes, they can still be vulnerable to freezing. Therefore, it is critical to winterize a mobile home.

Ventilation lines

Ventilation lines are essential to help keep the interior of a mobile home cool. It helps keep the unit dry and prevents the buildup of moisture. Vents need to be installed in strategic locations to allow for cross-ventilation. Mobile homes need at least one vent for every 150 square feet of floor space. Trailers require at least eight vents. Vents should be located in the corners of the home.

Poor factory design is one of the most common problems with venting into a mobile home. Many homeowners have no idea that venting is an integral part of the plumbing system. Proper ventilation also keeps pipes in a neutral pressure. If venting is improperly installed, you could have problems with drainage and gas. Adequate venting will prevent this from happening and keep your plumbing system functioning at its best. In addition, a healthy vent system prevents sewer gas odors.

Shutoff valves

In a mobile home, there should be at least two shutoff valves. One should be located near the water heater. Several shutoff valves may be grouped in one area throughout the house. Shutoff valves are generally oval knobs or round handles that turn clockwise to stop water flow to one fixture. Before you begin any repair work, ensure the shutoff valve works properly.

The shutoff valves for plumbing in a single-family home may be located in several locations, including the main house. If this is the case, you’ll want to find the one on the outside. Shutoff valves are generally located outside of a home, but the indoor ones may be inside. Shutoff valves are a good idea in every room because they will prevent water damage from occurring by unplugging the water line during repairs.

Problems with mobile home plumbing

There are a few things to keep an eye out for in your mobile home plumbing. The pipes that supply your mobile home may have frozen in the past. This is common, as manufactured homes have lines underneath the house. As the lines get old, they will likely rust and lose their quality. Other things to watch for include corrosion caused by age and impurities in the water.

In some cases, hard water can eat away at metal pipes. If severe decay occurs, it could lead to leaks or burst pipes. To avoid severe corrosion problems, you should install plastic pipes.

An excellent way to prevent problems with your mobile home plumbing is to inspect your mobile home regularly. You should check it at least twice a year. Check under the house, the walls, the floors, the sink, the bathtub, and the toilet. Be on the lookout for leaks and moisture, and you should also check the aerator screens in the sinks. Aerators are also essential to check when you change the furnace filter.