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Watts Pressure Relief Valve: FNPTF x FNPTF, 1 1/2 in x 2 in, Iron - ASME Section IV Hot Water Pressure Relief Valves
WattsASME Section IV Hot Water Pressure Relief Valves

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

The WATTS Pressure Relief Valve (MPN F383742) is an ASME Section IV hot water pressure relief valve with FNPTF x FNPTF connections, available in a 1 1/2 in x 2 in iron configuration and rated for a maximum operating…

SKU 3G-OTH-429330

Also listed as: F 383742 · F-383742

Brand
Watts
Item
Pressure Relief Valve: FNPTF x FNPTF, 1 1/2 in x 2 in, Iron
Category
ASME Section IV Hot Water Pressure Relief Valves
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Technical Specifications

Watts
Manufacturer Part Number
F383742
Type
1 1/2 in x 2 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 Pressure Relief Valve (MPN F383742) is an ASME Section IV hot water pressure relief valve with FNPTF x FNPTF connections, available in a 1 1/2 in x 2 in iron configuration and rated for a maximum operating pressure of 75 psi.

Frequently Asked Questions

What is a Watts pressure relief valve used for?

A Watts pressure relief valve protects hot water heating systems from overpressure. It automatically opens when pressure exceeds 75 psi, preventing equipment damage. This ASME Section IV valve is commonly installed on boilers and storage tanks in commercial and industrial facilities.

What are the specifications of the Watts F383742 pressure relief valve?

The Watts F383742 is a 1 1/2 in x 2 in FNPTF x FNPTF iron pressure relief valve with a maximum operating pressure of 75 psi. It is ASME Section IV rated for hot water service. The iron body provides durability in high-temperature industrial applications.

Where to buy Watts pressure relief valves worldwide?

3G Electric supplies Watts pressure relief valves like the F383742 to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial sourcing partner, we provide genuine Watts parts with reliable lead times and technical support.

How to install a Watts pressure relief valve?

Install the Watts valve in the hot water system's discharge piping with the arrow pointing away from the vessel. Ensure the discharge line is no smaller than the valve outlet and terminates safely. Never install a shutoff valve between the relief 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 iv 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 Pressure Relief Valve: FNPTF x FNPTF, 1 1/2 in x 2 in, Iron, 40 psi Max. Op Pressure (MPN F383792)
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/2 in x 2 in, Iron, 40 psi Max. Op Pressure (MPN F383792)
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 0383025)
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 0383025)
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron, 40 psi Max. Op Pressure (MPN F382870)
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 in x 1 1/4 in, Iron, 40 psi Max. Op Pressure (MPN F382870)
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 0383308)
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 0383308)
WATTS Pressure Relief Valve: FNPTF x FNPTF, 3/4 in x 1 in, Iron, 50 psi Max. Op Pressure (MPN F382392)
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 3/4 in x 1 in, Iron, 50 psi Max. Op Pressure (MPN F382392)
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 Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in, Copper Alloy, 125 psi Max. Op Pressure (MPN 3/4 LF3L-075)
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WATTS Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in, Copper Alloy, 125 psi Max. Op Pressure (MPN 3/4 LF3L-075)
WATTS Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in, Bronze, 20 psi Max. Op Pressure (MPN 3/4 M335M2-030)
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WATTS Pressure Relief Valve: MNPT x FNPT, 3/4 in x 3/4 in, Bronze, 20 psi Max. Op Pressure (MPN 3/4 M335M2-030)