Should I return this?

I bought Aquatec 8800 booster pump from BRS and installed on my 6 stage Ro Di unit.Before pump the water flow at 25-33 psi and after pump 28-39.It is not quiet different and I think something wrong with my pump.I did everything I can do like read trobling shoot and pdf of installation tip from BRS and did installed again and again but still water flow only at less 39psi. Anybody got answer for me? I have to return this? Pump isn't work well?



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Sounds broken. My booster pump brings my pressure from 30ish to 70 something.

 

Sounds like you might have a leak in the diaphragm, id return it.

 

There is an adjuster screw on top to increase and decrease pressure on some of these

 

Where is your pressure guage installed?

 

Post some photos of your system and how it is plumbed.
Aquatec pumps are the best in the business by far and not too many go bad.
As sailorguy asked, where is your pressure gauge and alex pointed out, the pumps can be adjusted. You are correct, they are not quiet pumps but they serve a purpose and the noise is easy to ignore versus not having a pump and a poor performing RO/DI system.