Monday, January 30, 2023


My RV’s water pump doesn’t work, but I can’t even find it!

Dear Dave,
I’ll be doing some dry camping soon, but my RV’s water pump quit working. When I flip the rocker switch, I’m greeted with silence. I’d like to troubleshoot it myself but I can’t even locate the pump! Any ideas on where it might be? Or am I getting in over my head in trying to fix it or replace it myself? —Susan, 2014 Keystone Outback 23TRS

Dear Susan,
Typically a smaller trailer will have the freshwater tank and water pump above floor level to help protect them from freezing. That means it would be hidden under a dinette seat or the bed. Before gong there, however, I would suggest looking at the 12-volt fuse in the distribution panel for the pump.

If you do not hear the whirring of the pump it is most likely not getting 12-volt power to the pump. So check 12-volt power to the fuse, then to the switch. It could also be another switch turned off, as most trailers will have one switch by the panel and another in the bathroom. Also, make sure other 12-volt components are working, like the lights, so you know the batteries are providing power.

Where to find RV’s water pump

Next, you will need to find the water pump and typically it will be very close to the fresh water tank. Your trailer will have an exterior fresh water tank fill, commonly called the gravity fill, on the driver side of the rig.

There is a short hose going from the gravity fill to the fresh water tank. So when you find the gravity fill, you will know the proximity of the tank. My guess is yours is under the front bed. You will need to lift the mattress off and there should be an access panel.

Once you find the pump, check all the connections to ensure they are solid. You should be able to use a 12-volt tester to verify power to the pump. It is very simple to troubleshoot as you can see the red (positive) and black (negative) wire so you can verify power. If there is no power to the pump, you would need to backtrack to the switch. If there is power, the motor to the pump is no good and it’s cheaper to just replace the entire pump in most cases.


Don’t forget, if you are planning to attend the Florida RV SuperShow in Tampa this week, I will be conducting the “Tips For Choosing The Right RV For You” every day in the seminar area. You can also attend the “RVing with Pets” seminar at 10 a.m. in the Lippert Scouts booth on Thursday, and the Coach-Net Meet And Greet 10 a.m. Friday.

Join us for the Talkin’ RV Tech with Dustin and Zach of California RV Specialists, myself, and Lippert technicians, live from the Lippert Scouts Trailer Thursday at 3:00 p.m. You can join on any of the, California RV Specialists, and Lippert Facebook and YouTube channels.

 You might also enjoy this from Dave 

Why did RV’s faucets leak after water pump was replaced?

Dear Dave,
Last winter the RV service center winterized our motorhome. We had told them that we already purged all water from plumbing so they only needed to put antifreeze into the plumbing. They forgot and burned out our pump, so they replaced it on their dime. When we dewinterized it, all of a sudden we had leaks in most of our faucets so had to replace them. My question is whether the pump is adjustable for water pressure, or if it is set at 40 psi. I’ve tried calling them, but they never answer or return my calls. Thanks, Dave! —Genevieve, 2005 Itasca Meridian

Read Dave’s answer.

Dave Solberg is a leading expert in the RV industry and the author of the “RV Handbook.”

Read more from Dave here


We have started a new forum link for Ask Dave. Please be as brief as possible. Attach a photo or two if it might help Dave with his response. Click to visit Dave’s forum. Or send your inquiries to him using the form below.

Click or drag a file to this area to upload.



If you value what you learn from, would you please consider becoming a voluntary subscriber by pledging your support? Every contribution, no matter how modest, helps us serve you better. Thank youLearn more here.

Facebook Groups you might like
RVing with Dogs
RV Tech Tips
RV Advice
Towing Behind a Motorhome
RVing Over 70
. . . and the official Facebook page

Winterizing your RV this season? Amazon has a wide choice of RV antifreeze.


5 6 votes
Article Rating
Subscribe to comments
Notify of

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Inline Feedbacks
View all comments

Subscribe to our newsletter

Every Saturday and Sunday morning. Serving RVers for more than 20 years.