You have not said whether you are using an inline water filter?
I purchased a pressure guage to test the CG pressure before connecting. I have found that using the Culligan water filter cut the pressure from 80 psi from the faucet to 35 psi on the out-put side without a water regulator.
At one CG with 80 psi from the faucet I did not use the water filter.
When I showered I turned on our water pump, but the pump did not come on and the flow was great.
I would think the screens used on water inlets would cause some water restriction.
Doug
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