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Watts Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze - ASME Section XIII Hot Water Pressure Relief Valves
WattsASME Section XIII Hot Water Pressure Relief Valves

Watts Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze

Watts ASME Section XIII Hot Water Pressure Relief Valves.

SKU 3G-OTH-442504

Also listed as: 2174A030FS · 2-174A-030-FS

Brand
Watts
Item
Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze
Category
ASME Section XIII Hot Water Pressure Relief Valves
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Technical Specifications

Watts
Manufacturer Part Number
2 174A 030 FS

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

Product Description

Watts ASME Section XIII Hot Water Pressure Relief Valves.

Frequently Asked Questions

What is a Watts 174A relief valve used for?

The Watts 174A relief valve is used to protect hot water heating systems from overpressure. It automatically opens when system pressure exceeds its set point, preventing damage to boilers, tanks, and piping. This ASME Section XIII valve is common in commercial and industrial hydronic applications.

What are the specifications of the Watts 2 174A 030 FS relief valve?

The Watts 2 174A 030 FS is a 2 in x 2 in FNPTF x FNPTF bronze relief valve with a maximum operating pressure of 150 psi. It is ASME Section XIII rated for hot water service. The bronze body resists corrosion in high-temperature hydronic systems.

Where to buy a Watts 174A relief valve worldwide?

3G Electric supplies the Watts 174A relief valve to customers worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this ASME Section XIII valve.

How to install a Watts 174A pressure relief valve?

Install the Watts 174A in the hot water system's discharge line with the valve stem vertical. Ensure no shutoff valve is placed between the valve and the system. Pipe the discharge to a safe drain location per local codes. Always follow the manufacturer's installation instructions.

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, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 174A 075 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 174A 075 FS)
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
Watts
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
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 174A 050 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 174A 050 FS)
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 174A 100 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 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, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 174A 125 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Bronze, 150 psi Max. Op Pressure (MPN 2 174A 125 FS)

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ASME Section XIII hot water pressure relief valve with 1 1/4 in FNPTF x FNPTF connections. Constructed from copper silicon alloy with an overall height of 8 1/2 in. Used in hot water systems to protect against overpressure conditions
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This ASME Section XIII hot water pressure relief valve features a 1 1/4 in x 1 1/2 in NPTF x NPTF iron body. Rated for a maximum operating pressure of 30 psi, it automatically opens to discharge excess water and prevent overpressure in hot water systems. Suitable for use in commercial and industrial water heating applications
This Watts pressure relief valve is constructed of iron with FNPTF x FNPTF connections. Rated for a maximum operating pressure of 40 psi, it is designed for ASME Section XIII hot water service. Typical applications include protecting water heaters and boilers from overpressure in commercial and industrial systems
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This Watts pressure relief valve is constructed of iron with FNPTF x FNPTF connections. Rated for a maximum operating pressure of 40 psi, it is designed for ASME Section XIII hot water service. Typical applications include protecting water heaters and boilers from overpressure in commercial and industrial systems
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This ASME Section XIII hot water pressure relief valve features 3/4 in FNPTF x 3/4 in FNPTF connections and a copper silicon alloy body. It automatically opens to relieve excess pressure in hot water heating systems, protecting against overpressure conditions. Commonly used in boilers, water heaters, and thermal systems
This ASME Section XIII pressure relief valve is designed for hot water systems, automatically opening when pressure exceeds safe limits to prevent overpressure damage. Constructed with a copper silicon alloy body and featuring FNPTF x FNPTF connections, it is suitable for use in boilers, water heaters, and hydronic heating systems
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This ASME Section XIII pressure relief valve is designed for hot water systems, automatically opening when pressure exceeds safe limits to prevent overpressure damage. Constructed with a copper silicon alloy body and featuring FNPTF x FNPTF connections, it is suitable for use in boilers, water heaters, and hydronic heating systems
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This ASME Section XIII hot water pressure relief valve features a cast iron body with FNPTF x FNPTF connections in 1-1/4 in x 1-1/2 in sizes. Rated for a maximum operating pressure of 75 psi, it is used in hydronic systems to protect boilers, water heaters, and storage tanks from overpressure by automatically releasing water when the set pressure is exceeded
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
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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