I was disappointed with the RV pump.With the system purged of air andfully charged; I would open the kitchen cold water faucet 1/2 wayand the pump would start to oscillate on and off continuously.
My first attempt at an accumulator was a 2" length of PVC the width of the RV. The result was hardly noticeable.
So, I tried using a Hot Water Heater Expansion Tank fromMenard's Lumber @ $38.00.
The tankneeded to be installed upright. I had an uglyplastic pail that it just fit into. I charged the tank to 30 psi and dropped it into the pail. I fastened the pail to the Black Water pipe. It can not drift around the basement.
The tank has a 3/4"male NPT fittingon the top of the tank. I purchased a Washing Machine Connection Hose with female hose fittings on each end and a Tubing Tee (1/2 OD tube x 1/2" OD tube x 3/4" female NPT). The fitting and hose worked great; no leaks and I tapedthe hoseto the black water pipe to keep it stable.
Now with the kitchen faucet turned 1/2 way on, the water runs for 45 seconds. Turning off the water at this point it will take the pump 15 seconds to recharge the plumbing system.
I may need to be careful using bleach in the water. The rubber hose may not stand up to it.
Those 2:00 AM trips to the bathroom won't be waking the family.