We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
RFQ CartGet a QuoteSign inSign up
Watts 1-1/4 174A 030 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 1-1/4 174A 030 FS ASME Section XIII Hot Water Pressure Relief Valve

The WATTS Relief Valve (SKU 3G-OTH-442546) 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…

SKU 3G-OTH-442546

Also listed as: 114174A030FS · 1 1 4 174A 030 FS · 1-1-4-174A-030-FS

Brand
Watts
Item
1-1/4 174A 030 FS ASME Section XIII Hot Water Pressure Relief Valve
Category
ASME Section XIII Hot Water Pressure Relief Valves
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

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

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The WATTS Relief Valve (SKU 3G-OTH-442546) 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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Compatible alternatives & equivalents

Cross-referenced by specification & description
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 174A 030 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 174A 030 FS)
WATTS Relief Valve: FNPTF x FNPTF, 1 1/2 in x 1 1/2 in, Bronze, 150 psi Max. Op Pressure (MPN 1-1/2 174A 150 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 1/2 in x 1 1/2 in, Bronze, 150 psi Max. Op Pressure (MPN 1-1/2 174A 150 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, 1 1/4 in x 1 1/4 in, Bronze, 150 psi Max. Op Pressure (MPN 1-1/4 174A 125 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Bronze, 150 psi Max. Op Pressure (MPN 1-1/4 174A 125 FS)
WATTS Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Bronze, 150 psi Max. Op Pressure (MPN 1-1/4 174A 150 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Bronze, 150 psi Max. Op Pressure (MPN 1-1/4 174A 150 FS)
WATTS Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Bronze, 150 psi Max. Op Pressure (MPN 1-1/4 174A 100 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Bronze, 150 psi Max. Op Pressure (MPN 1-1/4 174A 100 FS)

More from Watts

View all Watts parts →
This ASME Section XIII hot water pressure relief valve features a copper silicon alloy body and FNPTF x FNPTF connections. It is rated for a maximum operating pressure of 150 psi. Typical applications include overpressure protection for water heaters, boilers, and storage tanks in commercial and industrial hydronic systems
Watts
This ASME Section XIII hot water pressure relief valve features a copper silicon alloy body and FNPTF x FNPTF connections. It is rated for a maximum operating pressure of 150 psi. Typical applications include overpressure protection for water heaters, boilers, and storage tanks in commercial and industrial hydronic systems
Watts 1-1/4 174A 075 FS is an ASME Section XIII hot water pressure relief valve with 1 1/4 in FNPTF x FNPTF connections. The bronze body is rated for a maximum operating pressure of 150 psi. Used in hydronic heating systems to protect boilers, water heaters, and storage tanks from overpressure
Watts
Watts 1-1/4 174A 075 FS is an ASME Section XIII hot water pressure relief valve with 1 1/4 in FNPTF x FNPTF connections. The bronze body is rated for a maximum operating pressure of 150 psi. Used in hydronic heating systems to protect boilers, water heaters, and storage tanks from overpressure
ASME Section XIII hot water pressure relief valve with 3/4 in FNPTF x FNPTF connections. Copper silicon alloy body rated for 150 psi maximum operating pressure. Used to protect water heaters and boilers from overpressure in hot water systems
Watts
ASME Section XIII hot water pressure relief valve with 3/4 in FNPTF x FNPTF connections. Copper silicon alloy body rated for 150 psi maximum operating pressure. Used to protect water heaters and boilers from overpressure in hot water systems
Bronze body hot water pressure relief valve with 3/4 in FNPTF x 3/4 in FNPTF connections. Rated for maximum operating pressure of 150 psi. Certified to ASME Section XIII for overpressure protection in hydronic heating systems, boilers, water heaters, and storage tanks
Watts
Bronze body hot water pressure relief valve with 3/4 in FNPTF x 3/4 in FNPTF connections. Rated for maximum operating pressure of 150 psi. Certified to ASME Section XIII for overpressure protection in hydronic heating systems, boilers, water heaters, and storage tanks
ASME Section XIII certified hot water pressure relief valve with 1 in FNPTF x 1 in FNPTF connections. Constructed from copper silicon alloy. Maximum operating pressure 150 psi. Used in commercial and industrial hydronic systems to protect water heaters, boilers, and storage tanks from overpressure
Watts
ASME Section XIII certified hot water pressure relief valve with 1 in FNPTF x 1 in FNPTF connections. Constructed from copper silicon alloy. Maximum operating pressure 150 psi. Used in commercial and industrial hydronic systems to protect water heaters, boilers, and storage tanks from overpressure
Iron construction ASME Section XIII hot water pressure relief valve with 1 1/2 in x 2 in FNPTF connections. Rated for maximum operating pressure of 20 psi. Used to protect hot water boilers and heating systems from overpressure conditions
Watts
Iron construction ASME Section XIII hot water pressure relief valve with 1 1/2 in x 2 in FNPTF connections. Rated for maximum operating pressure of 20 psi. Used to protect hot water boilers and heating systems from overpressure conditions
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
Watts
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
Watts
Watts
Iron hot water pressure relief valve with 3/4 in NPTF x NPTF connections. Rated for 20 psi maximum operating pressure. Overall height 3 1/2 in. ASME Section XIII rated for hot water service. Used to protect water heaters and boilers from overpressure in commercial and industrial hot water systems