When is BackFlow Preventer Needed on RV with Water Pump and City Water Connection

Published 12/10/2019

Question:

I got a 2011 sabre and I’m hooked up to city water and my holding take is full do I need to put a back flow prevention valve on my water pump so it doesn’t fill my holding tank up

asked by: Greg S

Expert Reply:

Backflow preventers like the # CAM23402 you referenced are used to prevent water from backfeeding through the water pump and seeping back in to your fresh water tank when hooked to city water and potentially contaminating it.

A backflow preventer is also usually installed behind the city water connection to prevent water from coming out of the city water connection when you are using your freshwater tank and water pump.

If you are hooked to city water most of the time, you may not need to install a backflow preventer.

expert reply by: Jameson C