why does the rv water pump pulse

Why Does The Rv Water Pump Pulse ? [3 Reasons with Solutions]

A pulsing RV water pump is a common issue. It’s a fixable issue. Before deciding whether or not to address the issue, learn more about its beginnings.

Why does the RV water pump pulse?

RV’s water pump may start to pulse if your water flow is less than full. This pulsating effect can be caused by alternating on and off cycles. It doesn’t indicate the system is broken. It just means that less water is being poured into it.

You must still be apprehensive about this issue. But here, we’ve outlined all of the factors to clear up any doubts.

So, if you’re still confused, check out the full article.

So Why Does The RV Water Pump Pulse?

A pulsing RV water pump is caused by fluctuations in water pressure. However, there are a few less typical factors that might suggest a severe system problem.

These reasons with solutions are included here-

Reason-1: Check Valve Leakage

The check valve on an RV water pump is a typical source for leaks. Check to see if the water pump can manage the main water flow through the valves. It provides water from the city to enter the RV’s water tank. Then shuts it off if necessary.

Check for leaks in the pump if it makes any noise at intervals while drawing in water. 

This can occur if the check valve breaks. 

Solution: Repairing the Check Valve [8 Steps to Follow]

Repairing a faulty check valve may appear to be a difficult task. Before repairing the check valve, you have to remove the water line clamps of the RV. 

So we need to follow step-by-step instructions for fixing this issue. 

Let’s get started-


Turn off the main water supply. If you don’t, electrical wires could come into contact with the water and cause a dangerous situation.


Cover the regions around the pump with dry towels. Getting electrocuted isn’t the goal, so keep your distance from the electrical wires.


Disconnect the electrical lines first, then move them as far away from the pump as possible.


Disconnect both water pipes that are connected to the pump. Make sure you remove them carefully to make sure the lines or the seats don’t crack. 


Remove the check valve from the check valve’s location and remove the pump. Use a screwdriver if necessary.


The old check valve should be removed and replaced with a new one. Make sure you’re not exerting too much force. That could cause the new valve to fail as well.


Set the pump and the water lines after that. The seats of the water lines can be sealed using Teflon tape. These aid in the creation of a vacuum inside the water pump.


Connect the motor to the electrical lines. To keep the wires from being exposed, wrap them in electrical tape.

Now you can test the pump by turning on the switch. You’ll immediately notice if the suction is strong. If this fix doesn’t help you, you need to buy a new check valve asap.

Reason-2: Low Water Pressure

Low water tanks can cause your water pump to pulse. The pump tries to compensate for what it perceives as low water pressure.

If the RV water pump is left on without water, the same thing also happens if there is no water in the tank below a certain temperature.

Solution: Fix the Pump

If you’re using campground water, check to see if the pressure regulator filter screen is clogged.

Also, you need to replace the water filter at least once a year. If you don’t have access to a campground water supply, make sure the pump is turned on.

Examine the water flow from the hose connected to the hose spigot at the campground. Then use it to fill the RV’s freshwater tank. If the flow is low, disconnect it and turn on the pump.

If the RV has been winterized recently, make sure all valves are turned back on. 

Reason-3: Blockage in the Water system

If your RV’s water pump is pulsing, it may be a sign that something is wrong. Inspecting and cleaning the water filters should take care of it. Blockages in filters can’t cause the water to flow less, but they can cause the pump to get confused.

Solution: Clean the Water System

Over time, the water in your RV could go bad. It’s also possible for the tanks to develop a stench. The freshwater tank should be cleaned and sanitized regularly. 

Remember, for every 15 gallons, the container can hold, add a cup of bleach to clean it. After that, add water to it.

Then turn on the pump and open all of the RV’s faucets until you smell the bleach. You can try out the best RV hand pump faucet for this procedure. Drain the water system and run fresh water through the taps until no bleach odor remains.

If these reasons and solutions don’t fix your RV water pump pulsing stop, you need to buy a new water pump. So try these products for purchasing a new one-

An RV water pump pulsing can cause a variety of problems. To develop a viable solution to these issues, you must first be aware of the potential problems.

Hopefully, we were able to shed some light on the possible causes of an RV water pump pulse and what you can do to resolve the issue.


Q: How do you get your RV’s water pump to work correctly?

Answer: Ascertain that your freshwater tank is fully stocked. Then turn on the cold water tap. Then the water pump should be turned on. After that, your RV’s water pump should be primed.

Q: When connected to city water, does RV’s water pump have to be on?

Answer: When hooked up to city water, you should not run the water pump on your RV. Water pressure should be adequate because city water bypasses your RV’s water pump. The only purpose of your RV water pump is to draw fresh water from your RV water tank.

Q: Is the water pump in your RV powered by the battery?

Answer: RV water pumps are usually powered by the battery in your RV. They are typically 12 or 24 volts and only draw power when providing water.


Now you know why does the RV water pump pulse. Hopefully, this helps. Our discussion of the DIY method has already taken place.

Then again, you might not be able to do it all by yourself. Consider asking for help if necessary. You’ll at least get what you’re looking for this way.

Please keep us updated on how things are going!

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