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PRD823, Fantastic explanation. I did not think about the tank being designed for a specific differential (it just says "pre-charged to 38PSI, Maximum 100PSI". Boy, I guess it has been subjected to some abuse with the 32PSI differential (I had thought that this was the proper setting for the...

Rancher & Mike, Thanks for replying to this post. But I still do not see a clear picture of this. For example: At 38PSI cut-in and 70PSI cut-out, a 38PSI bladder will see a range of 32PSI with a maximum compression of 70PSI At 45PSI cut-in and 70PSI cut-out, a 38PSI bladder will see a...

Valveman, thanks for the reply, but my curiousity is still there. Currently, my system cuts in at 38PSI and cuts out at 70PSI (was that way when I bought the house). As such, when the system is fully charged and the pump cuts out at 70PSI, the bladder is exerting 70PSI (by the way, the tank is...

I am curious to know why the instructions for my bladder tank says "cut-in pressure must be the same as factory set pressure of 38PSI". I have done a little searching and seen most online recomendations state that bladder pressure (with the tank empty) is to be 2psi less than the pump cut in...