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Watts 3/4 M335M2-030 ASME Section IV Hot Water Pressure Relief Valve - ASME Section IV Hot Water Pressure Relief Valves
WattsASME Section IV Hot Water Pressure Relief Valves

Watts 3/4 M335M2-030 ASME Section IV Hot Water Pressure Relief Valve

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

Also listed as: 34M335M2030 · 3 4 M335M2 030 · 3-4-M335M2-030

Brand
Watts
Item
3/4 M335M2-030 ASME Section IV Hot Water Pressure Relief Valve
Part Number
3/4 M335M2-030
Category
ASME Section IV Hot Water Pressure Relief Valves
Available to Order
Also known as:3/4 M335M2-030Watts
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Technical Specifications

Watts
Manufacturer Part Number
3/4 M335M2-030
Type
3/4 in x 3/4 in, Bronze
Max. Op Pressure
20 psi

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3G Electric (S) Pte. Ltd. — Singapore

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.

Used in

Common applications for Watts
Commercial plumbing – Watts standard capacity water pressure regulators (3/8 LF 26AB) for stabilizing incoming water pressure
Industrial steam systems – Watts 152A series steam pressure regulators for pressure reduction in process and heating lines
Cross-connection control – Watts 757 double check backflow preventers for commercial and industrial water supply protection
Boiler safety – Watts ASME Section XIII temperature and pressure relief valves for overpressure protection in heating systems
Hydronic heating – Watts CP16 pilot-operated pressure regulators for maintaining consistent pressure in steam or water loops
Water hammer mitigation – Watts LF15M2-A water hammer arrestors for absorbing surges in quick-closing valve applications
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Watts 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.

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This bronze pressure relief valve is designed for hot water service in hydronic heating systems. It features 3/4 in x 3/4 in FNPT connections and a maximum operating pressure of 20 psi. Certified to ASME Section IV, it automatically opens at set pressure to discharge excess water, protecting water heaters and boilers from overpressure
Watts
This bronze pressure relief valve is designed for hot water service in hydronic heating systems. It features 3/4 in x 3/4 in FNPT connections and a maximum operating pressure of 20 psi. Certified to ASME Section IV, it automatically opens at set pressure to discharge excess water, protecting water heaters and boilers from overpressure

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