Lakejumper wrote:
Wnjj, I think that you might be correct. I did check the winterizing bypass valve and its in the correct position and very difficult to move so that isn't the culprit.
Bypass valve would NOT make pump work or not work.....it strictly just bypasses the water heater. Connects cold line to hot line....period
Pump pressure switch is what starts/stops pump
When hooked up to city water and you turn pump on it doesn't run because system pressure is high enough that pump pressure switch is OPEN
When you disconnect city water....unless you open a faucet (or have a leak) the system pressure remains charged enough to keep pump pressure switch OPEN
When you turn on a faucet/flush toilet etc. system pressure drops, pump pressure switch CLOSES and pump runs
If pump doesn't run.....tap pressure switch (on front/head of pump) as it could be sticking.
If pump runs...then you can remove pressure switch/clean/free it up OR REPLACE pressure switch
Typical RV pumps
Pressure switch OPENS at 45# OR 55#
Pressure switch CLOSES at 30# or 40#
Which BRAND/MODEL is your pump??
