Pressure switch questions?

[Ma98tron]

Do you need a pressure switch, the only reason I could think of that you would need one is if you build up to much pressure your pump will shut off. A safe guard if you will.

[Clinkis]

Definitely want one. If pressure gets too high and you are not paying attention things will start blowing apart. I blew the end caps off my membrane housing twice my first year with my last homemade RO. The following year I installed a high pressure switch and no problems since. A must have IMHO.