Can Bad Diverter Valve Cause Water Leak
Updated 12/24/2025 | Published 12/22/2025
Question:
I am experiencing the symptoms of a water leak. Pump wants to cycle just briefly every 3 to 5 minutes. I cannot find a leak anywhere. My question to you is could the cause be a faulty diverter valve allowing water to pass through back into the tank? I believe the valve I have is the BM44YR. Thank you
asked by: William P
Expert Reply:
Hi William; it is possible for the valve to be bad and cause the issue you're describing. If you leave the tank empty and switch it to city, and that still fills the tank, that is a good indicator of a bad valve and you should replace it with # BM44YR.
If that doesn't seem to be the case, there are some pressure tests and other things you can do to try and figure out if you have a leak or not and locate it. I recommend looking around online to find these methods. Even if you aren't actively seeing water anywhere it could be in a spot you're not finding and you really don't want to end up with water damage.
What kind of trailer do you have?
(click to enlarge)
Product Page this Question was Asked From
Replacement Diverter Valve for B&B RV Water Centers - 1/2" MPT Connections
- Accessories and Parts
- Smart RV
- Diverter Valve
- B and B Molders
more information >
Continue Researching
- Video: Replacement Plastic Check Valve for B and B Molders City Water Inlet: The Breakdown
- Shop: Replacement 3-Way Diverter Valve Assembly for B&B Nautilus P1/P2.5 Panels - 1/2" MPT
- Shop: Replacement Dual Diverter Assembly for B&B Nautilus P1 Panel - 1/2" MPT
- Q&A: Replacement parts for Diverter Valve for B&B RV Water Centers - 1/2" MPT Connections
- Q&A: Recommended Water Diverter Valve for a B&B RV Water Center
- Q&A: What Are The Two Sides On Replacement Diverter Valve for B&B RV Water Centers
- Q&A: Is There An Auto Start / Remote Start For Cummins Onan Generators? LP 5500 Gas Model
- Q&A: Looking for Replacement City Water Inlet and Check Valve
- Q&A: Is The Greystone RV Range A Spark Light Oven?
- Q&A: Availability Of Replacement Parts For Nautilus Panel On 2021 Grand Design Momentum 397TH
- Article: What are the Common Types of Propane Fittings Used on RVs?
- Article: How to Determine Tire/Wheel Diameter
- Article: 7 Common Questions Everyone Has About Trailer Tires
- Article: 30-Amp and 50-Amp RV Service: What's the Difference?
- Article: How to Winterize & De-Winterize Your RV (Simple Guide)
- Article: How to Measure for Travel Trailer and Fifth Wheel Steps
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
Richard S.
12/24/2025
2018 Keystone 5 th wheel had cracked elbow on water diverter valve and dripped constantly. Replaced with this item and problem was solved. I am 72 year old USMC vet with basic mechanical skills and limited plumbing experience. Job took about 2 hours to remove old valve and replace with new. Hardest part was removing sealant and gaining access to water center compartment and re-sealing it with new caulking. Make sure to mark all connections with matching numbers or letters in sharpie or no run ink before disassembly.