Tanks

[Superbee]

I have low water pressure here and no pump the system makes a lot of RO water but hardly comes out of water valve
what pressure can i run in these tanks? i have 2 4 gallon and now a new 20 gallon tank?

[Alex]

The standard 4 Gallon storage tanks should have 7 - 10 PSI with no back pressure (no water in the tank).

You can use a tire pressure gauge that can read below 10 PSI. There is a valve on the tank that you can check tank pressure.

If water comes out of the valve then the bladder is broken and you will need to either replace the bladder or the whole tank depending on manufacturer.

I am not sure about the 20 gallon tank as I am not familiar with this size tank. You may want to contact the manufacturer to verify pressure.