Where do I get a Star water systems power flush pump.

losing prime or level is not high enough

2nd question,you only need 1,it is losing prime, or seals are bad

Where replacement tank for 1101 power flush system

Add two wax rings

If it is not tripping the GFCI Outlet or tripping a breaker, than more than likely the impeller is stuck. You will have to remove it to find out.

Assuming nothing is jamming the impellor it sounds like a capacitor fault. Sometimes these are built in to the pump which can be a pain to get to. Normally near the handle where the cable enters the pump. If your lucky it will be mounted in a control box. Small cylindrical item about 3 inches long. Prob around 10, 12 or 16 micro farad. Easy to change, 2 wires not essential which way round

you need to flush out the rinnai. to do this you will need 4 gallons of white viniger & a circulating pump. #1 disconnect the power. #2 close both incoming & outgoing water valves under the unit. #3 conect a drain hose to the out going flush valve ( flush valves are under the unit & have brass caps) #4 connect pump outlet hose to ingoing flush valve. #5 put pump incoming hose & drain hose from outgoing flush valve in a 5 gallon bucket. #6 pour 4 gallons of vinager into the bucket. #7 open both flush valves. #8 turn on the circulating pump & let viniger pump in the incoming flush valve through the rinnai & out the outgoing flush valve back into the bucket for 45 min. #9 disconct pump from incoming side & close incoming flush valve.( don,t close outgoing vaves at this time) #10 put out going hose in empty bucket. #11 open incoming water to flush viniger out of unit. # 12 disconct outgoing hose , close outgoing flush valve & open outgoing water valve. #13 clean filter & turn on power.