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Watts Pressure Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Iron - ASME Section XIII Hot Water Pressure Relief Valves
WattsASME Section XIII Hot Water Pressure Relief Valves

Watts Pressure Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Iron

The WATTS Pressure Relief Valve (MPN 0358551) is an ASME Section XIII hot water pressure relief valve with 3/4 in x 3/4 in FNPTF connections and an iron body, rated for a maximum operating pressure of 10 psi. 3G…

SKU 3G-OTH-442467

Brand
Watts
Item
Pressure Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Iron
Category
ASME Section XIII Hot Water Pressure Relief Valves
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Technical Specifications

Watts
Manufacturer Part Number
0358551
Type
3/4 in x 3/4 in, Iron
Max. Op Pressure
10 psi
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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS Pressure Relief Valve (MPN 0358551) is an ASME Section XIII hot water pressure relief valve with 3/4 in x 3/4 in FNPTF connections and an iron body, rated for a maximum operating pressure of 10 psi. 3G Electric interprets this demand, sourcing and quoting the exact OEM part across 14 industrial departments, with specialist depth in combustion, pumps and controls as an authorised distributor.

Frequently Asked Questions

What is the Watts 0358551 pressure relief valve used for?

The Watts 0358551 is an ASME Section XIII hot water pressure relief valve used to protect water heaters and storage tanks from overpressure. It automatically opens at its 10 psi set pressure to discharge excess water, preventing system damage. Common in commercial and residential hydronic heating systems.

What are the specifications of the Watts 0358551 pressure relief valve?

The Watts 0358551 is a 3/4 in x 3/4 in FNPTF x FNPTF iron pressure relief valve with a maximum operating pressure of 10 psi. It is ASME Section XIII rated for hot water service. The manufacturer part number is 0358551, and it is made by Watts.

Where to buy the Watts 0358551 pressure relief valve worldwide?

3G Electric supplies the Watts 0358551 pressure relief valve worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this ASME-rated valve.

How to install a Watts pressure relief valve?

Install the Watts valve in the hot water system's tapping, ensuring the discharge pipe is directed to a safe drain. Use thread sealant on the FNPTF connections and tighten to manufacturer torque specs. Never install a shutoff valve between the relief valve and the tank. Test operation after installation.

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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