75GPD RO Unit. How much water are you getting?

[Delphinus]

Oh wow. Yeah, that is WAY too low. Look into the booster pump.

Are you on a well with a pressure tank or something? I know in my house which was built in 2004 I had lower pressure but it was because there was a pressure regulator on the water supply. I tried to increase the setting but then I found the reason for the regulator when I went to have a shower and the water jets were these little supersonic streams of pain coming out of the shower head, haha. So I dialed it back down, shut off the water main, went to home depot and rented a crimper, tied the RO/DI feed line into the pipe just before the regulator. So for $10 or whatever it was I got 96psi on the RO/DI *and* could still have a shower. Dunno if that would work for you but thought I'd toss the idea out there.

If that doesn't work for you though definitely look into the pressure booster.