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Dayton relief valve brass body with test lever

Dayton

Dayton 4KHA3 Relief Valve 22 GPM 250 psi 304 SS trap

SKU CH-QHSM-YNZ6F MPN 4KHA3

Pressure-relief valve protects positive-displacement pumps at 250 psi with a 304 stainless-steel seat and a 22 GPM flow rating

  • Product typeDrain Components
  • Protects positive-displacement pumps with factory-set 250 psi relief
  • 22 GPM flow capacity handles high-volume discharge reliably
  • 304 stainless-steel seat resists corrosion for long service life
  • Test lever included for quick functional verification
  • Compact 2 1/8 in length fits tight plumbing layouts

Relief Valve for Positive Displacement Pumps

The Dayton 4KHA3 is a factory-set relief valve rated at 22 GPM and 250 psi. It protects positive displacement pumps from over-pressure damage during operation. The body uses 304 stainless steel for the seat and a nylon construction. A test lever is included for manual verification.

Verify Connection Threads and Pressure Rating

Before ordering confirm that your system uses 3/4 NPT inlet and outlet threads. Ensure the pump’s maximum operating pressure does not exceed the 250 psi factory setting. The valve’s overall height is 5 1/4 inches and length is 2 1/8 inches, so check available mounting space.

Sustained Over-Pressure Protection

Under continuous load the spring-operated mechanism maintains the set pressure without drifting. The steel spring and 304 stainless steel seat resist wear during repeated cycling. The test lever allows periodic confirmation that the valve opens cleanly at the rated pressure.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $24.99
Cheaper than about 58% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDayton
Model name4KHA3
Product typeDrain Components

Questions about this item

Does the Dayton 4KHA3 relief valve ship with any fittings or piping, or do I need to buy 3/4 NPT connectors separately?

The valve body has 3/4 NPT inlet and outlet threads; no additional fittings or piping are included in the box.

Should I choose a different model if my system runs above 250 psi or needs more than 22 GPM flow?

This model is factory-set to 250 psi and rated for 22 GPM; select another valve if your pressure or flow requirements exceed those figures.

What does the 22 GPM rating mean when the valve is installed on a positive-displacement pump?

At the 250 psi set pressure the valve can pass up to 22 GPM, preventing over-pressure damage to the pump.

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