In the great state of washington, the city of seattle is offering coupons to the public to replace their toilets with 1.28 flushers.You can redeem the coupon at HD
CPVC is not a favorite of mine it seems like it get brittle on the hot side and cracks at the fittings a lot and then when you cut it back it just shatters and a one foot repair turns into a six foot repair,then it takes hours for the glue to cure on the hot side .Never considered thermal expansion on it,justif the heating and cooling effects of the water didn't age the pipe faster than expected and/or changed the molecular compisition of the pipe.
Has the pump failed or just the mercury switch?Has anyone just tried to run the pump seperately without the mercury switch?A sealed lift station shouldn't have an odor and a twelve foot head isn't to bad for most pumps.If the gfci is tripping is the circuit overloaded?startupwould put alot of load on and could cause the gfci to trip.is there a high water alarm on this system?maybe a new pump and a shorter leash on the mercury float and cycle the pump more and is paper products clumping on the float causing it to not turn on.sounds like the pumps needs to be switched out and a new pump and or lift station installed.
Lot of times you open up the cover and the clog is in the baffle or the filter going to the pump tank,always try to go from the tank when possible so I don't blow out the baffle.Also try to upsell them on extensions for the inlet and outlet so I don't spend time having to dig up the covers usually at night.