Components

Pressure Relief Valve

The same components fitted in every SMKO heater, available individually for replacement, servicing, and upgrades.

3/4" Pressure Relief Valve 30 psi (Lead-Free)

Designed for installation on water heating storage vessels to protect against over-temperature or excessive pressure. (Not for steam service) Features: CSA Compliance to ANSI Z21.22/CSA 4.4 Certified to ASME Section IV by National Board. Technical Specifications: Inlet Connection: 3/4" MNPT Outlet Connection: 3/4" FNPT Pressure Relief Setting: 30 PSI ASME Section IV: 500,000 BTU/HR.

$49.95

M335M2, 3/4" Boiler Pressure Relief Valve (30 psi), Male NPT, 510K BTU

Watts 335 series are intended for pressure relief applications with common size residential hot water boilers. Features: ASME rated All-bronze construction with stainless steel spring and silicone disc Technical Specifications: Size: 3/4" Connections: Male NPT (inlet) x Female NPT (outlet) Relief Pressure: 30 psi (fixed/non-adjustable) Max Boiler BTU: 510K BTU

$66.65

335M2, 3/4" Boiler Pressure Relief Valve (30 psi), Female NPT, 510K BTU

Watts 335 series are intended for pressure relief applications with common size residential hot water boilers. Features: ASME rated All-bronze construction with stainless steel spring and silicone disc Technical Specifications: Size: 3/4" Connections: Female NPT (inlet) x Female NPT (outlet) Relief Pressure: 30 psi (fixed/non-adjustable) Max Boiler BTU: 510K BTU

$60

374A, 3/4" Boiler Pressure Relief Valve (30 psi), 550K BTU

$50