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Watts Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron - ASME Section XIII Hot Water Pressure Relief Valves
WattsASME Section XIII Hot Water Pressure Relief Valves

Watts Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron

The WATTS Relief Valve (MPN 1 740 075 FS) is an ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections, sized 1 in x 1 1/4 in in iron construction, rated for a maximum operating pressure of…

SKU 3G-OTH-442485

Also listed as: 1740075FS · 1-740-075-FS

Brand
Watts
Item
Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron
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
1 740 075 FS
Type
1 in x 1 1/4 in, Iron
Max. Op Pressure
75 psi

Technical Documents

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

Product Description

The WATTS Relief Valve (MPN 1 740 075 FS) is an ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections, sized 1 in x 1 1/4 in in iron construction, rated for a maximum operating pressure of 75 psi.

Frequently Asked Questions

What is the Watts 1 740 075 FS relief valve used for?

The Watts 1 740 075 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 discharging water when system pressure exceeds the 75 psi set point.

What are the specifications of the Watts 1 740 075 FS relief valve?

This Watts relief valve has a 1 in FNPTF inlet and 1 1/4 in FNPTF outlet, a cast iron body, and a maximum operating pressure of 75 psi. It is ASME Section XIII rated for hot water service. The manufacturer part number is 1 740 075 FS.

Where to buy the Watts 1 740 075 FS relief valve worldwide?

3G Electric supplies the Watts 1 740 075 FS relief valve to customers worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time.

How to install the Watts 1 740 075 FS relief valve?

Install the Watts relief valve in the hot water system discharge line with the inlet connected to the boiler or tank tapping. Ensure the outlet is piped to a safe drain location. Use pipe thread sealant on the FNPTF connections and do not install a shutoff valve between the valve and the system.

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 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)
WATTS Relief Valve: FNPTF x FNPTF, 1 1/2 in x 2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/2 740 050 FS)
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WATTS Relief Valve: FNPTF x FNPTF, 1 1/2 in x 2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/2 740 050 FS)
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 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 1/4 in x 1 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/4 740 075 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/4 740 075 FS)
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 2 740 050 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 2 740 050 FS)

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WATTS RELIEF VALVE: NPTF x NPTF, 3/4 in x 3/4 in, Iron, 20 psi Max. Op Pressure, 3 1/2 in Overall Ht (MPN F358553)
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)
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