Ok got the paperwork.
"The most efficient use of the accumulator occurs with the pre-charge set at the SAME pressure as the pump's pressure switch "turn on" setting. Typically, a 45 PSI pump will turn on around 30 PSI. Therefore, the pre-charge should also be 30 PSI. The pre-charge MUST be set in a "STATIC" condition (pump off and at least one water fixture opened.)
Depending on pre-charge pressure to the accumulator, in relation to the pump turn on/off pressures, stored liquid is about 2 to 4 OZ. If the accumulator tank pre-charge exceeds pump turn on pressure, the liquid volume is reduced."
2 to 4 OUNCES? WTF. Looks like this was a waste of money.
Not the first waste of money in my RV journey!
Oh and there is a NOTE that says it is not recommended for use with a 4900 or 5900 series smart sensor pump.
I will need to be checking THAT too.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW