Water systems in cabins can get pretty noisy without a buffer. This tank acts as a shock absorber for the plumbing, evening out the pressure so you get a steady stream rather than a series of jerks. It is straightforward to plumb in right after the pump. You can check the air pressure through the valve to keep everything balanced correctly. Most boaters find that having this extra bit of capacity keeps the motor from working harder than necessary while keeping the water pressure consistent throughout the day.
water pump accumulator tank
Quiet and efficient water system upgrades.