I know the disclaimer states a max PSI rating, and trust me if you get it anywhere near it this unit leaks like crazy. At normal pressure 25-50 PSI it's fine but when my well pump kicks in and faucets are open the pressure sometimes goes above 60psi and this thing starts dripping, above 60 and it leaks really bad. So if you know your pressure will always be below 50 than you're fine.