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Dayton pressure switch, 30/50 PSI, Auto/Off, 1/4 in FNPT port, NEMA 1, CSA UL

Dayton

Dayton Pressure Switch 30/50 PSI Auto/Off

SKU CH-GS3A-ZB9EP

Controls water-pump pressure between 30 and 50 psi with a DPST auto/off switch rated for 1½ hp at 120 V and 2 hp at 240 V

  • Product typeLight Switch
  • Auto/off convenience with 30/50 psi factory settings
  • Handles up to 2 hp at 240 V single phase
  • CSA certified and UL listed for safety compliance
  • Operates reliably from -22 °F to 250 °F
  • 1/4 in FNPT port fits standard pump connections

Dayton Pressure Switch 30/50 PSI

This Dayton pressure switch controls water-pump operation with an automatic on/off action. It uses a DPST contact form and a single 1/4 in FNPT port. The unit is CSA certified and UL listed for safety compliance. It operates within a temperature range of -22 to 250 degrees F.

Suits standard residential

Installers needing a factory-set 30/50 psi range with a 15 to 50 psi adjustable differential will find this model suitable. It supports 1 1/2 hp at 120V and 2 hp at 240V single-phase motors. Builders requiring an unloader valve or a different NEMA rating should look elsewhere.

Manual Auto/Off lever allows direct pump control

The integrated manual switch action lets users override automatic cycling for maintenance or emergency shut-off. No unloader valve is included, so plumbing must accommodate pressure relief separately. The NEMA 1 enclosure is intended for indoor, dry locations only.

How it compares

Measured against everything we stock in Electrical Switches & Dimmers, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 77% of the 791 comparable items (median $39.99).

Specifications

Product
Brand nameDayton
Product typeLight Switch

Questions about this item

Does my pump need a 1/4 in FNPT port to connect this pressure switch?

Yes, the switch has a single 1/4 in FNPT port for direct connection to the pump.

Will this switch handle a 120 V motor rated at 1 1/2 hp or a 240 V motor rated at 2 hp?

It is rated for 1 1/2 hp at 120 V single-phase and 2 hp at 240 V single-phase.

How can I verify the switch is operating at the correct 30/50 psi settings after installation?

Watch the system pressure gauge; the pump should start at 30 psi and stop at 50 psi.

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