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Watts 3/4 174A 150 FS ASME Section XIII Hot Water Pressure Relief Valve - ASME Section XIII Hot Water Pressure Relief Valves
WattsASME Section XIII Hot Water Pressure Relief Valves

Watts 3/4 174A 150 FS ASME Section XIII Hot Water Pressure Relief Valve

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

SKU 3G-OTH-442461

Also listed as: 34174A150FS · 3 4 174A 150 FS · 3-4-174A-150-FS

Brand
Watts
Item
3/4 174A 150 FS ASME Section XIII Hot Water Pressure Relief Valve
Category
ASME Section XIII Hot Water Pressure Relief Valves
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Watts
Manufacturer Part Number
3/4 174A 150 FS
Type
3/4 in x 3/4 in, Bronze
Max. Op Pressure
150 psi

Technical Documents

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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

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

Frequently Asked Questions

What is the Watts 3/4 174A 150 FS relief valve used for?

The Watts 3/4 174A 150 FS is an ASME Section XIII hot water pressure relief valve used in commercial and industrial hydronic systems. It protects boilers, water heaters, and storage tanks from overpressure by automatically opening at a set pressure, preventing catastrophic failure in heating and process applications.

What are the specifications of the Watts 3/4 174A 150 FS relief valve?

This Watts relief valve has a 3/4 inch FNPTF x 3/4 inch 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 3/4 174A 150 FS, and it is designed for reliable overpressure protection.

Where to buy the Watts 3/4 174A 150 FS relief valve worldwide?

You can source the Watts 3/4 174A 150 FS relief valve through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Watts components for commercial and industrial applications.

How to install a Watts 3/4 174A 150 FS relief valve?

Install the Watts 3/4 174A 150 FS relief valve in the hot water system's designated tapping, ensuring the discharge piping is directed to a safe drain. Use thread sealant on the FNPTF connections and tighten to manufacturer torque specs. 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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Compatible alternatives & equivalents

Cross-referenced by specification & description
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 075 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 075 FS)
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 100 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 100 FS)
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 125 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 125 FS)
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 050 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 050 FS)
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 20 psi Max. Op Pressure (MPN 3/4 174A 030 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 20 psi Max. Op Pressure (MPN 3/4 174A 030 FS)
WATTS Relief Valve: FNPTF x FNPTF, 1 in x 1 in, Bronze, 150 psi Max. Op Pressure (MPN 1 174A 150 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 in x 1 in, Bronze, 150 psi Max. Op Pressure (MPN 1 174A 150 FS)

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Bronze body pressure relief valve with 1-1/4 in FNPTF x FNPTF connections. Rated for 150 psi maximum operating pressure. Complies with ASME Section XIII standards for hot water service. Used in hydronic heating systems to protect boilers and water heaters from overpressure
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This Watts pressure relief valve is designed for hot water systems, providing overpressure protection in accordance with ASME Section XIII. It features FNPTF x FNPTF connections, a cast iron body, and a maximum operating pressure of 75 psi. Suitable for use in hydronic heating systems and hot water storage tanks
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