I'm installing a preassure cutoff switch in my RO/DI
topoff system. This preassure switch has brass fittings. Ideally it would be best to install the preassure switch after the RO/DI filter in the topoff system so that my preassure pump would run continually until the preassure in my resevoir reached the appropriate preassure. If it is installed before the RO/DI filter then the pump will only run for a short period of time until it reaches the cutoff preassure and then turn off until preassure decreases and then continue the cycle. This will decrease the efficiency of the RO/DI filter because it will not consistently be run at as high of a preassure and decrease the life of the preassure motor because it is constantly turning on and off.
I know that installing brass parts in a saltwater aquarium would normally be stupid, but should I be able to get away with it in this case because only freshwater will be coming in contact with the brass?
