An RV water pump is a device that helps deliver water to the different fixtures in your recreational vehicle. It is usually powered by 12-volt DC electricity, and it uses a diaphragm to create suction that pulls water from your fresh water tank and delivers it under pressure to the fixtures in your RV.
One common issue that RVers face with their water pumps is pulsing. Pulsing is when the water pump turns on and off rapidly, making a pounding or thumping noise in the process. This can be caused by a few different things.
The different types of RV water pumps
There are two main types of RV water pumps: diaphragm pumps and centrifugal pumps.
Diaphragm pumps are the most common type of RV water pump. They use a rubber diaphragm to create suction that pulls water from your fresh water tank and delivers it under pressure to the fixtures in your RV.
Centrifugal pumps are less common, but they are also used in some RVs. These pumps work by using a spinning impeller to push water through the pump and into your RV’s plumbing system.
What causes an RV water pump to pulse?
Pulsing can be caused by a few different things, but the most common cause is an issue with the check valve. The check valve is a one-way valve that prevents water from flowing back into the fresh water tank when the pump is turned off.
If the check valve is defective, water can flow back into the fresh water tank and cause the pump to cycle on and off rapidly. This can damage the pump and reduce its lifespan.
Another common cause of pulsing is an issue with the pressure switch. The pressure switch turns the pump on and off based on the water pressure in the RV’s plumbing system. If the pressure switch is set too low, it can cause the pump to cycle on and off frequently.
Lastly, pulsing can also be caused by a build-up of sediment in the fresh water tank. Sediment can build up over time and clog the inlet screen of the water pump. This can cause the pump to cycle on and off frequently as it tries to draw water from the tank.
How to fix a pulsing RV water pump
The best way to fix a pulsing RV water pump is to have it professionally serviced. A qualified RV technician will be able to diagnose the issue and make the necessary repairs.
If you are comfortable servicing your own RV, you can try cleaning or replacing the check valve. You can also try adjusting the pressure switch. If you have sediment buildup in your fresh water tank, you will need to flush the tank and clean out the inlet screen on the water pump.
Servicing your RV water pump, you can try the following:
- Clean or replace the check valve.
- Adjust the pressure switch.
- Flush the fresh water tank and clean the inlet screen on the water pump.
Tips for maintaining your RV water pump
There are a few things you can do to maintain your RV water pump and prevent issues:
- Inspect the check valve regularly and replace it if it is damaged.
- Inspect the pressure switch regularly and adjust it if necessary.
- Flush your fresh water tank regularly to prevent sediment buildup.
- Winterize your RV water pump to prevent freezing and damage.
Following these tips will help you keep your RV water pump in good working condition.
RV water pumps are an essential part of any recreational vehicle, and it is important to maintain them properly. Pulsing can be caused by a few different things, but the most common causes are an issue with the check valve or the pressure switch. Servicing your RV water pump regularly will help prevent issues and keep your pump in good working condition.
The water pump is usually located in the same area as the fresh water tank. More info: Where Is Water Pump Located In Rv?
Replacing an RV water pump can cost anywhere from $100 to $500, depending on the type of pump and the complexity of the installation.
You should service your RV water pump every year or two, depending on how often you use it. If you use your RV frequently, you may need to service it more often.
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