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

SKU 3G-OTH-442476

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

Watts
Manufacturer Part Number
1 174A 150 FS
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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

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 to protect water heaters and storage tanks from overpressure. It automatically opens at its set pressure to discharge excess water, preventing system damage. Common in commercial and residential hydronic heating systems.

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

This Watts relief valve has 1-inch FNPTF x FNPTF connections, 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 174A 150 FS, and it is designed for overpressure protection in hydronic systems.

Where to buy Watts relief valves worldwide?

3G Electric supplies Watts relief valves worldwide, handling full logistics, customs clearance, and delivery to your site. As a global industrial distributor since 1990, we source genuine Watts components like the 1 174A 150 FS. Contact us for pricing and lead time on this ASME-rated valve.

How to install a Watts 174A pressure relief valve?

Install the Watts 174A in the hot water outlet line of the heater, with the valve stem vertical. Use pipe thread sealant on the FNPTF connections and ensure the discharge pipe is directed to a safe drain. Never install a shutoff valve between the heater and relief valve. 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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