Yes, it's a pressurized tank that installs in-line with the pump. no power, only pressure. PSI can be changed through a bicycle (Schrader) valve located on the accumulator body. I installed one on my previous pop-up and they really work nice. Quieter system, less pump cycling, and smoother flow to the faucets. Again, this is when you are using your water tank and don't have a city hook-up.
Sold 2005 Fleetwood Allegiance
Sold 1999 Durango