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Bronze temperature and pressure relief valve with white finish, 3/4 inch FNPT connections

Apollo

Apollo 18C5125125 Temperature and Pressure Relief Valve 125 psi

SKU CH-J1B8-F8HK8 MPN 18C5125125

Temperature and pressure relief valve with ¾-inch FNPT connections, bronze body, 125 psi factory setting and 210 °F maximum temperature

  • Product typeDrain Components
  • Product colorWhite
  • Factory-set 125 psi protects water heaters from over-pressure
  • 205,000 BtuH capacity handles high-demand residential systems
  • Auto re-seating design restores seal after pressure release
  • Bronze body with stainless steel spring resists corrosion
  • ANSI Z21.22, ASME HV and CSA certified for code compliance

Temperature & Pressure Relief Valve

This valve protects water heaters by discharging when temperature reaches 210 °F or pressure hits 125 psi. It features a bronze body, stainless-steel spring and automatic re-seating after activation. The FNPT inlet and outlet both measure 3/4 in. It meets ANSI Z21.22, ASME HV and CSA standards.

Suitable Installations and Limitations

The unit suits residential and light-commercial water-heating systems requiring a factory-set 125 psi relief point. It will not serve installations that demand a different pressure setting, a non-FNPT connection or a higher BtuH capacity than 205 000.

Deciding Specification

The factory-set pressure of 125 psi is the single figure that determines whether this valve matches the system design. Verify the required relief pressure before purchase.

How it compares

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

Price $68.99
Pricier than about 70% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameApollo
Model name18C5125125
Product typeDrain Components
Product colorWhite

Questions about this item

What pressure rating does the ANSI Z 21.22 and ASME Code HV valve cap at?

The valve is factory set at 125 psi and meets ANSI Z 21.22 and ASME Code HV standards for temperature and pressure relief.

What inlet and outlet connections are required to mount this valve?

The valve has a 3/4 inch FNPT inlet and a 3/4 inch FNPT outlet, so matching female NPT fittings are needed for installation.

How is the thermostat probe installed and what common step is missed?

Insert the 5 inch thermostat probe directly into the tank tapping so it contacts the water; the step often missed is ensuring the probe is fully immersed and not blocked by insulation or fittings.

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