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Bronze safety relief valve, three-quarter inch NPT, test lever, 125 psi set pressure

Apollo

Apollo 1740203 Safety Relief Valve 3/4 in 125 psi Trap

SKU CH-5V2J-QCB3V MPN 1740203

A safety relief valve set at 125 psi with a 75 to 150 psi adjustable range, silicone disc and seat, stainless steel spring, and test lever for hot water systems up to 250 °F

  • Product typeDrain Components
  • Factory-set 125 psi protects hot-water systems
  • Adjustable 75 to 150 psi range suits varied installations
  • Bronze body with silicone disc resists corrosion up to 250 °F
  • 791 000 BtuH capacity handles high-demand supply lines
  • Stainless-steel spring and test lever ensure reliable operation

Safety relief valve for hot water systems

The Apollo 1740203 is a cast-bronze safety relief valve built for hot water supply systems. It connects with a 3/4 in MNPT inlet and a 3/4 in FNPT outlet. The valve opens at a factory-set pressure of 125 psi and operates within a 75 to 150 psi range. A test lever is included for manual verification.

Installers needing a 125 psi discharge point

This valve suits plumbing professionals who require a code-compliant relief device rated for 791 000 BtuH on residential or light-commercial hot water tanks. The silicone disc and seat handle temperatures from 0 to 250 degrees F. It is not intended for steam service or for systems that demand a different factory-set pressure.

Factory-set pressure of 125 psi

The single specification that determines fit is the factory-set pressure of 125 psi. The valve will begin to open at this pressure and is adjustable only within the 75 to 150 psi range stated by the manufacturer. If the system design calls for a different set point, this model will not meet that requirement.

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 nameApollo
Model name1740203
Product typeDrain Components

Questions about this item

How much heat does the Apollo 1740203 release when it runs all day?

The valve itself does not generate heat; it simply opens at the factory-set 125 psi to protect a hot-water system that operates between 0 and 250 °F.

What piping must already be in place for the Apollo 1740203 to install?

A 3/4-inch male NPT inlet and a matching 3/4-inch female NPT outlet on the existing hot-water supply line.

Will the Apollo 1740203 work with older bronze piping and fittings?

Yes, its cast-bronze body and silicone seat are compatible with traditional bronze systems, and the 75–150 psi range covers legacy pressure settings.

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