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Where does the pressure switch sit on your system?
On some RVs, it's located under the kitchen sink. Some pressure switches are located right on the pumps themselves.
RV water pump pressure switches are generally installed on the wall or in a compartment that is close to where your fresh water is going to be pumped.
This is done so that the switch can maintain a steady connection with the pipes and plumbing system. This ensures that you have an accurate reading when it comes to your pump's pressure.
That said, this location works for many different makes and models of RVs and travel trailers. But, some setups may require a different placement of the pressure switch, depending on how you have your rig set up.
Some people like to keep their freshwater tanks in an enclosed compartment, but many don't do this. The compartment has its own unique temperature which can affect how well your pressure switch will work.
One of the common problems with RVs is having low water pressure in the shower and sink. When this occurs, it may be tempting to just spend money on a new water pump. However, there are several other issues that could be at play here. One of these is the water pressure switch. Here's how you can troubleshoot an RV water pressure switch to help determine if the pump or the switch is the issue.
- Shut Off The Pump
- Turn On The Pump And Check The Pressure
You'll want to start by shutting off your pump. You'll then want to turn on a faucet that isn't controlled by a diverter valve (like a sink) and let it run until all of the water has drained from the lines. This will take more than a minute, so be patient.
Once all of the water is out of your lines, turn on your pump again. If you have good pressure in your faucet this time around, your pressure switch needs to be replaced.
Checking the Water Pressure Switch
The first thing to do when you have no water pressure in your RV is to check the water pressure switch. This is a small black box with a hose attached to it. The box is usually located under the sink , on the water pump, or near the water pump.
If the switch has been tripped, you may see a red indicator light. To reset it, simply push in on the switch until you hear a click and feel it snap back into place. If you do not hear a click, then press down on it until you do.
With the switch reset, turn on your faucet and see if any water comes out. If there is still no water flow, check for kinks in any of your hoses or connections that may be preventing water flow. Also look for leaks or drips in any of those hoses.
If you've checked everything over and decide you want to replace the pressure switch or replace the water pump itself, you might want to look at the rv water pump replacement cost.
Frequently Asked Questions
Q: How do you test a water pump pressure switch?
Step 1: Turn off the pump.
Step 2: Hold the tube that is attached to the switch with your thumb.
Step 3: Turn on the pump and see if water comes out of the tube.
Q: How do you reset a pressure switch?
Test for power at the switch. This is typically controlled by a fuse or circuit breaker that matches the current draw of the pump. You can test for power using a voltmeter, plugging in a light or other electrical device, or using a non-contact voltage tester.
If you have power coming into the pressure switch but no power coming out when you turn on the switch, replace it.
Q: How do you replace a water pressure switch?
- Turn off the power to the pump at the circuit breaker. If you can't find it, shut off the main power to the house.
- Turn off both valves that supply water to the pressure tank. Open a faucet in the house to drain and relieve pressure in the system.
- Unscrew and remove the electrical conduit from the switch and tank with a wrench, then detach any wires from terminals on the switch with a screwdriver.
- Remove the switch by unscrewing its mounting nut with an adjustable wrench or socket wrench, then pull it out of the tank tee fitting and discard it. Clean out any sediment that has built up inside of the fitting with a stiff-bristled brush.
- Install the new switch by inserting it into the tank tee fitting, hand-tightening its mounting nut, and tightening it all of the way with hand tools until it is snug.
- Reassemble all wires, reconnecting them to their proper terminals on the switch and reattaching them to their original positions within their electrical conduit using hand tools.
- Restore power to pump at circuit breaker or main breaker box.
The Pressure switch plays an important role in the electrical systems of recreational vehicles. It is connected between source and destination wiring which feeds the pump. When the pump senses less than normal water pressure, it turns on. The pump keeps on running until the pressure is normal again to turn off the system. By now, I hope that you have a better idea about what these switches are, and why they’re so essential to your recreational vehicle’s function. If you need help shopping for them, or have more questions about different types of rv water pump pressure switch brands and their features, feel free to get in touch with us here at any time. We’re happy to help.