Watts Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in, Bronze
The WATTS Pressure Relief Valve (MPN 3/4 M335M2-030) is an ASME Section IV hot water pressure relief valve with a 3/4 in x 3/4 in MNPT x FNPT connection in bronze, rated for a maximum operating pressure of 20 psi. 3G…
SKU 3G-OTH-429304
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Product Description
The WATTS Pressure Relief Valve (MPN 3/4 M335M2-030) is an ASME Section IV hot water pressure relief valve with a 3/4 in x 3/4 in MNPT x FNPT connection in bronze, rated for a maximum operating pressure of 20 psi. 3G Electric interprets this demand and delivers genuine industrial equipment across 14 departments, with specialist depth in combustion, pumps and controls as an authorised distributor for brands including Watts, Schneider, ABB, Siemens, SKF, Festo, Fluke, Interpump and FBR.
Frequently Asked Questions
What is the Watts 3/4 M335M2-030 pressure relief valve used for?
The Watts 3/4 M335M2-030 is an ASME Section IV hot water pressure relief valve used in hydronic heating systems and hot water storage tanks. It automatically opens to relieve excess pressure when the system exceeds 20 psi, preventing equipment damage and ensuring safe operation in residential and commercial boiler applications.
What are the specifications of the Watts 3/4 M335M2-030 pressure relief valve?
The Watts 3/4 M335M2-030 is a bronze pressure relief valve with 3/4 in MNPT x 3/4 in FNPT connections. It has a maximum operating pressure of 20 psi and is ASME Section IV certified for hot water service. The valve is manufactured by Watts under part number 3/4 M335M2-030.
Where to buy the Watts 3/4 M335M2-030 pressure relief valve worldwide?
3G Electric supplies the Watts 3/4 M335M2-030 pressure relief valve to customers worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact our team to place an order or request a quote for international shipping.
How to install the Watts 3/4 M335M2-030 pressure relief valve?
Install the Watts 3/4 M335M2-030 valve in the hot water system discharge piping with the inlet connected to the system and outlet directed to a safe drain. Use thread sealant on the MNPT connections and ensure the valve is oriented vertically. Never install a shutoff valve between the relief valve and the system. Follow local plumbing codes.
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Common applications for WattsWatts Products
3G Electric supplies Watts asme section iv hot water pressure relief valves. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.














