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41

Valve Tech / Re: CSV 125 50psi failing

« Last post by ron958 on May 06, 2025, 05:46:02 PM »

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.

42

Valve Tech / Re: CSV 125 50psi failing

« Last post by Cary Austin on May 06, 2025, 06:59:55 AM »

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.

43

Valve Tech / Re: CSV 125 50psi failing

« Last post by ron958 on May 05, 2025, 07:36:26 PM »

I received the CSVS 125. Thank you. The new valve was placed in service with the same results.
 Using an existing hose bib at the well head and isolating the rest of the system, timed how long to fill a 5 gallon pail.
Manually start pump, back pressure 120 psi. open valve, outlet pressure 50 psi.
After 1 minute 5 gallon pail full.

Removed CSVS 125 from the line, repeated same test, same equipment.
After 1 minute two (2) 5 gallon pails full = 10 gallons

Replaced CSVS 125 valve conducted another identical test. Same results 1 minute one(1) 5 gallon pail full.
Nothing between CSVS 125 and pump except check valve at top of pump.
Pump 3/4 hp 12 gpm.

44

Pumps, Wells, Tanks, Controls / Re: Booster Pump

« Last post by Cary Austin on March 31, 2025, 01:52:44 PM »

Yes, you can easily add a pump to boost the 44 PSI gravity supply to 60 PSI or whatever you want. But we would need to know the flow rate required by the "high flow" demands to size a pump.

45

Pumps, Wells, Tanks, Controls / Booster Pump

« Last post by Winesalot on March 29, 2025, 11:31:53 AM »

Here is my setup: Well pump feeds a 3800-gallon cistern on the high-elevation portion of our property, which is 100' in elevation above our commercial/residential building. The building is fed from the cistern with 2" white pipe, and I get the expected 44 psi at the building. The 2" pvc feed from the cistern is converted to a 1-1/2" Uponor PEX main header that runs the length of the building with tee's supplying all the various water needs.

I would like to boost the building's pressure to 60 psi. We have a commercial hot water dishwasher, and it just barely meets the minimum pressure required. (We Occasionally get a low-pressure error code.) We also find on our wine production crush pad that our garden hoses feel like they have a bit of a weak stream.

It seems logical that I would install a booster where the water comes into the building, where the pipe converts from 2" PVC to 1-1/2" PEX. The pump would only need to increase pressure by 20 psi but would need to meet the potential high-flow needs of a wine-tasting room, wine production space, and a three-bedroom residence.

I'd love to hear your thoughts.

46

Valve Tech / Re: Pressure between the pump and CSV

« Last post by Cary Austin on December 09, 2024, 08:53:17 AM »

With the CSV1A adding additional back pressure it can make the pump think the well is deeper.  So, you should be fine as is.  But if you get a chance to change it the 1HP motor is fine, even with a 3/4HP pump end.  You could put a 10 GPM, 3/4HP pump on the 1HP motor, or replace the 10 GPM, 1HP pump end with a 15-18 GPM, 1HP pump end.

47

Valve Tech / Re: Pressure between the pump and CSV

« Last post by Mike56 on December 06, 2024, 02:33:19 PM »

Thanks, Cary. The well guys put this in because that's all they had on their truck, saying it would be no issue. I suspected it wasn't right. They replaced a 3/4hp, 10gpm. I need to have this corrected to a 3/4 or even 1/2hp with this well setup, correct?

48

Valve Tech / Re: Pressure between the pump and CSV

« Last post by Cary Austin on December 06, 2024, 12:36:14 PM »

The back pressure to a Cycle Stop Valve is always whatever the pump can supply.  Looking at the curve for the 10 GPM, 1HP pump you mention it has a shut off head of 450'.  Subtracting the 40' for the static level leaves 410' or 177 PSI back pressure.  That is not too much for the CSV1A but is for the CSV125. 

That pump is really designed for a well with water at 200' or more.  The back pressure from the CSV is needed to keep that pump from upthrusting, as it is in a much shallower well than it was designed for.

A 15 or 20 GPM, 1HP would be better suited for a 40'-60' well and would only have 80-120 PSI back pressure.

49

Valve Tech / Pressure between the pump and CSV

« Last post by Mike56 on December 06, 2024, 09:32:01 AM »

I've read a number of posts on the line pressure created by the CSV, no need to go into any details. My question is: With a 3/4hp pump the max pressure created in the line by the CSV will be X. Given an identical install, and the pump is now 1 hp, will the max pressure created by the CSV remain the same or will it increase? The 1 hp pump is this one: Franklin 1hp 10gpm 230v 3W 4" SS 4400 TRI Series FPS, static water is at 40', pump at 60'.

50

Applications / Re: plumbing question for csv

« Last post by Cary Austin on August 07, 2024, 08:58:30 AM »

If you have a tight fit and then tighten a union it can pull on the CSV.  If the pipe in the ditch after the CSV settles and drops, it can put the CSV in a bind by bending it.  The CSV1A is much stronger and impossible to plumb in a bind.  It is also much shorter and you would not have to double elbow around.  The CSV1A would just fit on the pipe before it goes underground.