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Cycle Stop Valve CSV1A

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5.00 LBS
Calculated at checkout

Product Description


The Cycle Stop Valve model CSV1Z is a pump control valve that automatically adjusts pump output to match variable flow requirements. Downstream of the device, pressure remains constant as long as demand is between the upper and lower limits of the valve. The 1" CSV1Z handles from 1-25 GPM. 
As flow rates vary, the change in pressure causes the valve to modulate closer to or farther away from the valve seat. This enables the pressure downstream of the CSV to remain constant depending on pressure fall off.

When there is no longer any demand on the system, the pressure begins to rise and the valve is pressed against the valve seat. The valve and seat are designed to never be able to completely seal. The non-closing seat is sized to allow flow of approximately 1 gpm on this valve. As this flow continues past the seat, water begins to fill the pressure tank downstream of the CSV. As the pressure tank slowly fills, the system pressure will slowly rise to pressure switch shut off. (Note: Pressure switch shut off pressure must always be higher than the constant pressure held by the CSV).

Regardless of tank size, when the tank fills, the pressure downstream of the CSV rises to pressure switch shut off point and the pump will be shut off. As flow is again demanded from the system, the pressure tank will empty and the pressure switch will start the pump.


Model CSV1A is dual-threaded and is available in 1" female NPT/1 1/4" male NPT. This model is adjustable from 15-150 PSI.  There can be no more than 125 PSI maximum differential pressure across any of these valves. (Difference in pressure between inlet pressure and outlet pressure).

We want this upgrade to go well for you so please contact us before ordering with any questions. We will provide telephone support for products purchased from us.

We also encourage you to visit the visit the manufacturer site: Cycle Stop Valves



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AQUA SPECIALTIES LLC, 561 First NH Turnpike, Northwood, NH 03261 (603) 942-5671