How to Connect the B&B RV Water Center BM32GR to a Black Water Tank
Updated 08/13/2026 | Published 08/07/2026
Products Featured in This Question
Question:
BandB RV Water Center - City/Tank Fill - Ventless - Tank Flush - Shower - 2 Coax What is involved with hooking up the black water tank flush. My old unit doesn’t have one. Where do I connect the line to the black tank? Thanks
asked by: Bill U
Expert Reply:
Hey Bill. The 1/2" MPT tank flush port on the back of the B&B RV Water Center item # BM32GR is going to connect to your black water holding tank's built-in rinse nozzle. The water center uses 1/2" PEX pipe to connect to the black tank.
If your black tank doesn't have a built-in rinse nozzle, you can use the Replacement Flusher Sprayer item # BM33GR to add one. You'll also need the B&B RV Vacuum Breaker item # BM93GR to prevent wastewater backflow from the black tank from contaminating the city water inlet inlet on the Water Center item # BM32GR. You would then just need to source the 1/2" PEX pipe and the 1/2" MPT male and female fittings from a local hardware store.
What kind of RV do you have? Feel free to answer this and throw in any other questions you have, where it says Add Comment.
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Product Page this Question was Asked From
B&B RV Water Center - City/Tank Fill - Ventless - Tank Flush - Shower - 2 Coax
- RV Water Inlets
- City Water Inlet
- Recessed Mount
- 11-1/16W x 6T Inch Cutout
- 3-3/4 Inch Deep
- Plastic
- 13W x 7-3/4T Inch Flange
- Black
- B and B Molders
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Bill U.
8/11/2026
Thank you. That is what I was hoping I could do. Also thanks for the part list. Bill.