Filmtec membranes are spec'ed to a maximum of 300 psi, but other components of your system can't withstand high pressure like that. Plumbing code calls for a max of 80 psi. The weakest part of the systems in terms of being able to withstand pressure is the clear housings. Best to put your pump AFTER the prefilters. So in a 4 stage system like this:
water flow would go like this:
sediment filter to
carbon block to
strainer to
pump to
pressure gaguge and RO membrane to
DI
Russ
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