CSV 125 50psi failing

[Cary Austin]

I don't understand your test and I don't see a problem.  The CSV is maintaining 50 PSI constant as it should.  The 120 PSI back pressure just means you could open another faucet or two and still have 50 PSI constant as the back pressure comes down to signify more usage.  All you are testing is how much water can go through the hose bib at different pressures.  At 50 PSI constant you can only get 5 GPM through the hose bib.  Without the CSV the pressure is higher and you get more flow through the hose bibb.  But if you restricted the hose bibb to 5 GPM as before, the pump would cycle on and off without having the CSV.

Re-reading back to 2023, I don't think there was a problem there either.  When running two sprinklers the pressure dropped to 32 PSI, and I don't see how the back pressure could have been 120 PSI.  That is because when you open enough hose bibs to get the pressure below 50 PSI, the CSV just turns into a piece of pipe.  At 32 PSI the back pressure should have been about 40 PSI because you were using all the water a 3/4HP, 12 GPM pump could supply.

If when you open enough hose bibs to bring the pressure below 50 PSI, the back pressure on the CSV should drop to almost the same.  As long as the CSV is holding 50 PSI as it should, it is doing its job.

Now if you want more pressure the CSV125 also comes in 60 PSI, but I think you are out of pump and need a larger one for what you are doing.

[ron958]

Looking to get more volume using CSVS 125. Pressure is fine no issues.
Test is to determine gallons produced by a 12 gpm pump in one minute with the CSVS in the piping system and when the CSVS is removed from the piping system. Container used to measure was a 5 gallon pail.
1 minute of unrestricted flow, tap wide open, with CSVS 125 in water line, 5 gallons.
1 minute of unrestricted flow, tap wide open, without CSVS 125 in water line 10 gallons.
Question is, does the plastic restrictor on the inlet side  of the valve restrict the flow to 5 gallons per minute.

[Cary Austin]

NO!  The CSV125 doesn't have much restriction until 50 GPM is used. With the CSV installed you cannot test how much the pump will produce because the CSV will only let out as much as your faucet will at 50 PSI.  The faucet only lets out 5 GPM at 50 PSI.  If you open enough faucets or big enough valve to get the pressure down to 40 PSI the CSV will be wide open and you can test how much the pump is producing, just not from a single little faucet.  The faucet is restricting the flow, not the CSV.

[ron958]

If I understand you correctly, using an 1 1/4” hose with 1 1/4” valve on the outlet of the CSVS 125 50-1  should allow the pump to develop its full potential of 12 gpm? The CSV valve is at the top of the well, the pump approximately 20’ deep in the well with a 1 1/4” pvc line between the pump and the valve.