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WattsASME Section XIII Hot Water Pressure Relief Valves

WATTS RELIEF VALVE: NPTF x NPTF, 1 in x 1 in, Copper Silicon Alloy

The Watts Relief Valve (MPN F121494) is an ASME Section XIII hot water pressure relief valve with 1 in x 1 in NPTF x NPTF connections, constructed from copper silicon alloy and rated for a maximum operating pressure…

SKU 3G-OTH-442530

Also listed as: F 121494 · F-121494

Brand
Watts
Item
RELIEF VALVE: NPTF x NPTF, 1 in x 1 in, Copper Silicon Alloy
Category
ASME Section XIII Hot Water Pressure Relief Valves
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Watts
Manufacturer Part Number
F121494
Type
1 in x 1 in, Copper Silicon Alloy
Max. Op Pressure
56 psi

Technical Documents

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

Product Description

The Watts Relief Valve (MPN F121494) is an ASME Section XIII hot water pressure relief valve with 1 in x 1 in NPTF x NPTF connections, constructed from copper silicon alloy and rated for a maximum operating pressure of 56 psi.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the Watts F121494 relief valve used for?

The Watts F121494 is an ASME Section XIII hot water pressure relief valve used to protect water heaters and storage tanks from overpressure. It automatically opens at 56 psi to discharge excess pressure, preventing system damage. Common in commercial and industrial hot water systems.

What are the specifications of the Watts F121494 relief valve?

The Watts F121494 is a 1 in x 1 in NPTF x NPTF relief valve made of copper silicon alloy. It has a maximum operating pressure of 56 psi and is ASME Section XIII certified for hot water service. The manufacturer part number is F121494.

Where to buy the Watts F121494 relief valve worldwide?

3G Electric supplies the Watts F121494 relief valve worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time. We source genuine Watts components for commercial and industrial applications.

How to install the Watts F121494 relief valve?

Install the Watts F121494 relief valve in the hot water system's tapping, ensuring the discharge pipe is directed to a safe drain. Use thread sealant on NPTF 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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Compatible alternatives & equivalents

Cross-referenced by specification & description
Watts
Watts
This ASME Section XIII certified pressure relief valve is designed for hot water service on pressure vessels such as water heaters and boilers. The iron body features NPTF connections (2 in inlet x 2 1/2 in outlet) and opens automatically at its 30 psi set pressure to discharge excess water, preventing overpressure damage. Suitable for commercial and industrial hot water systems
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN F121524)
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN F121524)
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121514)
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121514)
Watts
Watts
This ASME Section XIII hot water pressure relief valve features a 1 1/4 in x 1 1/2 in NPTF x NPTF iron body. Rated for a maximum operating pressure of 30 psi, it automatically opens to discharge excess water and prevent overpressure in hot water systems. Suitable for use in commercial and industrial water heating applications
Watts
Watts
WATTS RELIEF VALVE: NPTF x NPTF, 1 1/2 in x 2 in, Iron, 30 psi Max. Op Pressure, 9 1/4 in Overall Ht (MPN F383740)
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121517)
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121517)

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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 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
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