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Watts 1-1/2 740 050 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 1-1/2 740 050 FS ASME Section XIII Hot Water Pressure Relief Valve

The WATTS Relief Valve is an ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections, available in a 1 1/2 in x 2 in iron configuration. It has a maximum operating pressure of 75 psi (MPN…

SKU 3G-OTH-442535

Also listed as: 112740050FS · 1 1 2 740 050 FS · 1-1-2-740-050-FS

Brand
Watts
Item
1-1/2 740 050 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
1-1/2 740 050 FS
Type
1 1/2 in x 2 in, Iron
Max. Op Pressure
75 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 with FNPTF x FNPTF connections, available in a 1 1/2 in x 2 in iron configuration. It has a maximum operating pressure of 75 psi (MPN 1-1/2 740 050 FS).

Frequently Asked Questions

What is the Watts 1-1/2 740 050 FS relief valve used for?

The Watts 1-1/2 740 050 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 releasing water when system pressure exceeds 75 psi.

What are the specifications of the Watts 1-1/2 740 050 FS relief valve?

This Watts relief valve has a 1 1/2 in FNPTF inlet and a 2 in FNPTF outlet, with a cast iron body. Its maximum operating pressure is 75 psi. The manufacturer part number is 1-1/2 740 050 FS, and it is designed for ASME Section XIII hot water service.

Where to buy the Watts 1-1/2 740 050 FS relief valve worldwide?

3G Electric supplies the Watts 1-1/2 740 050 FS relief valve worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and a quote for your region.

How to install a Watts hot water pressure relief valve?

Install the Watts relief valve in the hot water system discharge line with the sensing element immersed in the top of the tank or piping. Ensure no shutoff valve is placed between the valve and the system. Pipe the discharge to a safe drain, following local codes and the manufacturer's 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, 1 1/2 in x 2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/2 740 075 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 1/2 in x 2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/2 740 075 FS)
WATTS Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron, 75 psi Max. Op Pressure (MPN 1 740 075 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron, 75 psi Max. Op Pressure (MPN 1 740 075 FS)
WATTS Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/4 740 050 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/4 740 050 FS)
WATTS Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron, 75 psi Max. Op Pressure (MPN 1 740 050 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron, 75 psi Max. Op Pressure (MPN 1 740 050 FS)
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
Watts
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
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 1 in, Iron, 75 psi Max. Op Pressure, 5 5/8 in Overall Ht (MPN 3/4 740 075 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 1 in, Iron, 75 psi Max. Op Pressure, 5 5/8 in Overall Ht (MPN 3/4 740 075 FS)

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ASME Section XIII hot water pressure relief valve with 1 1/2 in FNPTF x FNPTF connections. Constructed of copper silicon alloy. Overall height 9 1/4 in. Used in hydronic systems to protect boilers, water heaters, and storage tanks from overpressure
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This ASME Section XIII hot water pressure relief valve features a copper silicon alloy body and 1 1/2 in FNPTF x 1 1/2 in FNPTF connections. It is designed to automatically relieve excess pressure in hot water systems, protecting equipment such as water heaters and boilers from overpressure conditions
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This ASME Section XIII hot water pressure relief valve features a copper silicon alloy body and 1 1/2 in FNPTF x 1 1/2 in FNPTF connections. It is designed to automatically relieve excess pressure in hot water systems, protecting equipment such as water heaters and boilers from overpressure conditions
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This Watts pressure relief valve is ASME Section XIII rated for hot water service. It features a 3/4 in x 3/4 in FNPTF iron body and a maximum operating pressure of 10 psi. Used to protect water heaters and storage tanks from overpressure by automatically opening at set pressure
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This Watts pressure relief valve is ASME Section XIII rated for hot water service. It features a 3/4 in x 3/4 in FNPTF iron body and a maximum operating pressure of 10 psi. Used to protect water heaters and storage tanks from overpressure by automatically opening at set pressure
This ASME Section XIII rated pressure relief valve is constructed with a copper silicon alloy body and features 3/4 in FNPTF x 3/4 in FNPTF connections. It is designed for hot water service up to 210 °F, automatically opening at a set pressure to discharge excess water and protect water heaters and boilers from overpressure in hydronic heating systems
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This ASME Section XIII rated pressure relief valve is constructed with a copper silicon alloy body and features 3/4 in FNPTF x 3/4 in FNPTF connections. It is designed for hot water service up to 210 °F, automatically opening at a set pressure to discharge excess water and protect water heaters and boilers from overpressure in hydronic heating systems
This ASME Section XIII hot water pressure relief valve features a cast iron body with FNPTF inlet and outlet connections. It is designed to automatically discharge water when system pressure exceeds the 75 psi maximum operating pressure, protecting boilers, water heaters, and storage tanks in hydronic systems
Watts
This ASME Section XIII hot water pressure relief valve features a cast iron body with FNPTF inlet and outlet connections. It is designed to automatically discharge water when system pressure exceeds the 75 psi maximum operating pressure, protecting boilers, water heaters, and storage tanks in hydronic systems
This Watts hot water pressure relief valve is constructed with a bronze body and features 3/4 in FNPTF x 3/4 in FNPTF connections. It is ASME Section XIII rated for hot-water service and has a maximum operating pressure of 20 psi. The valve automatically opens to discharge water when system pressure exceeds the set point, protecting hydronic heating systems from overpressure
Watts
This Watts hot water pressure relief valve is constructed with a bronze body and features 3/4 in FNPTF x 3/4 in FNPTF connections. It is ASME Section XIII rated for hot-water service and has a maximum operating pressure of 20 psi. The valve automatically opens to discharge water when system pressure exceeds the set point, protecting hydronic heating systems from overpressure
This ASME Section XIII hot water pressure relief valve features 3/4 inch FNPTF inlet and outlet connections and a copper silicon alloy body. It is rated for a maximum operating pressure of 150 psi and is used to protect hydronic systems from overpressure
Watts
This ASME Section XIII hot water pressure relief valve features 3/4 inch FNPTF inlet and outlet connections and a copper silicon alloy body. It is rated for a maximum operating pressure of 150 psi and is used to protect hydronic systems from overpressure