Thats true peg but, since our pump will cycle on and off if we leave it on(like captmarks does), it will reduce the number of cycles if we turn it off when were not using it. Plus, we use dock pressure when were at the dock so its not used very often. Only thing is ours doesnt 'thump' every 30 seconds, its more like 30minutes so its not an issue, yet..
Captmark, have you tried getting on shurflo's website and finding a break down of the pump? Flojet has a nice break down of our pump with part numbers for everything. Not looked up the prices for the check valve though.
1990 16x78' stardust
10:54:07 AM by