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Watts Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Bronze - ASME Section XIII Hot Water Pressure Relief Valves
WattsASME Section XIII Hot Water Pressure Relief Valves

Watts Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Bronze

The WATTS Relief Valve (SKU 810MU1) is an ASME Section XIII Hot Water Pressure Relief Valve with FNPTF x FNPTF connections, sized 1 1/4 in x 1 1/4 in in bronze, rated for a maximum operating pressure of 150 psi (MPN…

SKU 3G-OTH-442546

Brand
Watts
Item
Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Bronze
Category
ASME Section XIII Hot Water Pressure Relief Valves
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Technical Specifications

Watts
Manufacturer Part Number
1-1/4 174A 030 FS
Type
1 1/4 in x 1 1/4 in, Bronze
Max. Op Pressure
150 psi
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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS Relief Valve (SKU 810MU1) is an ASME Section XIII Hot Water Pressure Relief Valve with FNPTF x FNPTF connections, sized 1 1/4 in x 1 1/4 in in bronze, rated for a maximum operating pressure of 150 psi (MPN 1-1/4 174A 030 FS). 3G Electric interprets this demand and sources the genuine WATTS part across 14 industrial departments, with specialist depth in combustion, pumps and controls as an authorised distributor.

Frequently Asked Questions

What is the Watts 174A relief valve used for?

The Watts 174A is an ASME Section XIII hot water pressure relief valve used in commercial and industrial hydronic heating systems. It protects boilers and water heaters from overpressure by automatically opening at a set pressure, preventing equipment damage and ensuring safe operation.

What are the specifications of the Watts 1-1/4 174A 030 FS relief valve?

This Watts relief valve has FNPTF x FNPTF connections, 1 1/4 in x 1 1/4 in size, and a bronze body. It is rated for 150 psi maximum operating pressure and complies with ASME Section XIII standards for hot water service. The manufacturer part number is 1-1/4 174A 030 FS.

Where to buy Watts relief valves worldwide?

3G Electric supplies Watts relief valves worldwide, handling full logistics and customs clearance for international orders. As a global industrial equipment distributor since 1990, we source and deliver genuine Watts products to any country. Contact our team for a quote and delivery timeline.

How to install a Watts 174A pressure relief valve?

Install the Watts 174A in the hot water outlet line of the boiler or water heater, with the valve stem vertical. Use pipe thread sealant on the FNPTF connections and ensure no debris blocks the discharge. Never install a shutoff valve between the relief valve and the system. Test operation after installation.

Used in

Common applications for Watts
Industrial burner gas safety systems — Watts HF2000 filters with GF-series seal kits maintain clean, regulated gas supply to burner pilot and main flame controls
Commercial heating and boiler installations — Modular filter assemblies support preventive maintenance and component replacement without full system shutdown
Process gas delivery pipelines — DN25 through DN125 filter bodies accommodate varying flow rates and inlet pressures across manufacturing and chemical processes
Gas pressure regulation benches — Multi-stage Watts filter platforms integrate with pressure reducers and safety shutoff valves in test and calibration environments
Equipment retrofit and upgrade projects — Available connection sizes and seal kits enable adaptation of newer Watts components into legacy gas control systems
Planned maintenance and spare-parts inventory — Filter seal kits allow facilities to stock consumables in advance, reducing downtime during scheduled gas system servicing

Watts Products

3G Electric supplies Watts asme section xiii 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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