The plumbing inside a mobile home is pretty much the same is it is for any site-built home. Each fixture has (or should have) individual shut-off valves. Shut-off valves at the toilet, under the sinks and even at the water heater can be used to turn off the water supply for that particular fixture.
But shutting off the main water supply in a mobile home can be a little more difficult than in a site-built house because mobile homes are raised up off the ground and the shut-off valves often come in from under the house, where they are protected.
The location of the main shut-off can vary, so it is just a matter of checking various locations to find the valve.
Where can you find the main water supply?
Look for the main shut-off valve where the water main ties into the mobile home water line. There should be a gate valve or ball valve at this location. Getting to it is another story. If you are lucky there is a section of easily removable siding nearby that you can just unscrew or slide out of the way to get to the shut-off valve. Sometimes there may be a vent nearby that you can remove to reach the shut-off valve. Another way is to just climb under the mobile home to find the shut-off valve and then turn it off.
The shut-off valve may be located somewhere in the yard outside the mobile home. You find this more in colder areas where a stop-and-waste valve is installed somewhere before the water main runs in under the home. Examine any yard or irrigation boxes you find in the yard. Stop-and-waste valves require a meter key to shutting them off, so make sure you have one handy for emergencies.
- Finally, the water meter may be the easiest way to turn off the water. Sometimes there are two valves in the water meter—one before the meter and another after the meter. The homeowner is responsible for anything after the water meter, so if there is a valve after the meter, that's the one you are supposed to use. If there is no second valve, just the valve before the water meter, then you'll need to talk to the water company and get permission to turn off their valve. A water key is usually required to turn this metering valve. Water keys can be bought at your local home improvement or hardware store.
- Note: If you break the meter valve you can be held liable, so do check with your local water company before shutting the meter off. In many areas, the company will come to shut off your water whenever you need to do plumbing repairs—after finishing, they'll turn the water back on as soon as you call again. This way, any damage to the shut shut-off valve or meter is their responsibility.