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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 (MPN 1-1/4 174A 150 FS) is an ASME Section XIII hot water pressure relief valve with 1 1/4 in x 1 1/4 in FNPTF connections in a bronze body, rated for a maximum operating pressure of 150 psi…

SKU 3G-OTH-442486

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 150 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 (MPN 1-1/4 174A 150 FS) is an ASME Section XIII hot water pressure relief valve with 1 1/4 in x 1 1/4 in FNPTF connections in a bronze body, rated for a maximum operating pressure of 150 psi. 3G Electric interprets customer demand and delivers this genuine industrial component across 14 departments—including plumbing, HVAC, and instrumentation—with specialist depth in pumps and controls as an authorised distributor for brands like Watts, Schneider, and ABB.

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 designed to protect water heaters and boilers from overpressure. It automatically opens when system pressure exceeds 150 psi, preventing equipment damage. Common in commercial and industrial hydronic heating systems.

What are the specifications of the Watts 1-1/4 174A 150 FS relief valve?

This Watts relief valve has a 1 1/4 in FNPTF x 1 1/4 in FNPTF connection, a bronze body, and a maximum operating pressure of 150 psi. It is ASME Section XIII certified for hot water service. The manufacturer part number is 1-1/4 174A 150 FS.

Where to buy Watts 174A relief valves worldwide?

3G Electric supplies the Watts 174A relief valve to customers worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this ASME-rated bronze valve.

How to install a Watts 174A hot water relief valve?

Install the Watts 174A in the hot water outlet line with the valve stem vertical. Ensure the discharge piping is directed to a safe drain and is no smaller than the valve outlet. Never install a shutoff valve between the relief valve and the system. Follow local codes.

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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