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Watts Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 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 1/4 in x 1 1/2 in, Iron

The WATTS Relief Valve (SKU 3G-OTH-442497) is an ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections, available in a 1 1/4 in x 1 1/2 in iron configuration. It has a maximum operating…

SKU 3G-OTH-442497

Also listed as: 114740030FS · 1 1 4 740 030 FS · 1-1-4-740-030-FS

Brand
Watts
Item
Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron
Category
ASME Section XIII Hot Water Pressure Relief Valves
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Watts
Manufacturer Part Number
1-1/4 740 030 FS
Type
1 1/4 in x 1 1/2 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 (SKU 3G-OTH-442497) is an ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections, available in a 1 1/4 in x 1 1/2 in iron configuration. It has a maximum operating pressure of 75 psi (MPN 1-1/4 740 030 FS). 3G Electric interprets customer demand and delivers this genuine industrial part across 14 departments, with specialist depth in combustion, pumps and controls as an authorised distributor.

Frequently Asked Questions

What is a Watts 1-1/4 740 030 FS relief valve used for?

This Watts ASME Section XIII hot water pressure relief valve protects boilers and water heaters from overpressure. It opens automatically at 75 psi to discharge excess pressure, preventing system damage. Common in commercial and industrial hydronic heating systems.

What are the specifications of the Watts 1-1/4 740 030 FS relief valve?

The Watts 1-1/4 740 030 FS is an ASME Section XIII hot water pressure relief valve with 1 1/4 in FNPTF inlet and 1 1/2 in FNPTF outlet. It has a maximum operating pressure of 75 psi and a cast iron body construction.

Where to buy a Watts 1-1/4 740 030 FS relief valve worldwide?

3G Electric supplies the Watts 1-1/4 740 030 FS relief valve worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time.

How to install a Watts 1-1/4 740 030 FS relief valve?

Install the Watts relief valve in the hot water outlet line of the boiler or heater, with the inlet connected to the system and the outlet piped to a safe discharge location. Ensure no shutoff valve is placed between the valve and the system. Follow local codes.

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 1 740 030 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron, 75 psi Max. Op Pressure (MPN 1 740 030 FS)
WATTS Relief Valve: FNPTF x FNPTF, 1 1/2 in x 2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/2 740 030 FS)
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 1/2 in x 2 in, Iron, 75 psi Max. Op Pressure (MPN 1-1/2 740 030 FS)
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 3/4 740 030 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 3/4 740 030 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)
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 1-1/4 740 075 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)

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WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 2 740 030 FS)
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WATTS Relief Valve: FNPTF x FNPTF, 2 in x 2 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 2 740 030 FS)
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WATTS RELIEF VALVE: NPTF x NPTF, 1 1/4 in x 1 1/2 in, Iron, 30 psi Max. Op Pressure (MPN F383025)
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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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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)