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Watts Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze - ASME Section XIII Hot Water Pressure Relief Valves
WattsASME Section XIII Hot Water Pressure Relief Valves

Watts Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze

The WATTS Relief Valve is an ASME Section XIII hot water pressure relief valve, type FNPTF x FNPTF, in a 3/4 in x 3/4 in bronze configuration with a maximum operating pressure of 150 psi (MPN 3/4 174A 100 FS).

SKU 3G-OTH-442460

Brand
Watts
Item
Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze
Category
ASME Section XIII Hot Water Pressure Relief Valves
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Technical Specifications

Watts
Manufacturer Part Number
3/4 174A 100 FS
Type
3/4 in x 3/4 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 is an ASME Section XIII hot water pressure relief valve, type FNPTF x FNPTF, in a 3/4 in x 3/4 in bronze configuration with a maximum operating pressure of 150 psi (MPN 3/4 174A 100 FS).

Frequently Asked Questions

What is a 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 a set pressure to discharge excess water, preventing system damage. 3G Electric supplies this valve for industrial plumbing and HVAC applications worldwide.

What are the specifications of the Watts 3/4 174A 100 FS relief valve?

This Watts relief valve has 3/4 inch FNPTF x FNPTF connections, a bronze body, and a maximum operating pressure of 150 psi. It is ASME Section XIII rated for hot water service. The manufacturer part number is 3/4 174A 100 FS. 3G Electric sources this genuine Watts valve for global delivery.

Where to buy a Watts 174A relief valve worldwide?

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

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

Install the Watts 174A in the hot water system discharge line with the arrow on the body pointing in the flow direction. Use pipe dope on the FNPTF threads and ensure the discharge pipe is routed to a safe drain. Never install a shutoff valve between the relief valve and the tank. 3G Electric can supply this valve for your project.

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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