Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

Watts Pressure Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Copper Silicon Alloy - ASME Section XIII Hot Water Pressure Relief Valves
WattsASME Section XIII Hot Water Pressure Relief Valves

Watts Pressure Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Copper Silicon Alloy

SKU 3G-OTH-442509

Brand
Watts
Item
Pressure Relief Valve: FNPTF x FNPTF, 2 in x 2 in, Copper Silicon Alloy
Category
ASME Section XIII Hot Water Pressure Relief Valves
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

Watts
Manufacturer Part Number
0121566
Type
2 in x 2 in, Copper Silicon Alloy
Overall Ht
11 1/2 in
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Frequently Asked Questions

What is a Watts pressure relief valve used for?

A Watts pressure relief valve protects hot water systems from overpressure by automatically releasing water when pressure exceeds safe limits. It is commonly installed on boilers, water heaters, and storage tanks in commercial and industrial facilities to prevent equipment damage and ensure safety.

What are the specifications of the Watts 0121566 pressure relief valve?

The Watts 0121566 is an ASME Section XIII hot water pressure relief valve with 2 in FNPTF x 2 in FNPTF connections. It is made of copper silicon alloy and has an overall height of 11 1/2 in. This valve is designed for reliable overpressure protection in high-temperature water systems.

Where to buy a Watts pressure relief valve worldwide?

3G Electric supplies the Watts 0121566 pressure relief valve to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact our team for a quote and lead time on this ASME-rated valve for your hot water system.

How to install a Watts pressure relief valve?

Install the Watts valve in the hot water system discharge line with the arrow on the body pointing in the flow direction. Ensure the valve is upright and the discharge pipe is sized to handle full flow without restriction. Always follow local codes and the manufacturer's instructions for safe operation.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Similar products

Matched by specification & description
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121517). Key specifications — Brand: WATTS.
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121517). Key specifications — Brand: WATTS.
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/2 in x 1 1/2 in, Copper Silicon Alloy (MPN 0121544). Key specifications — Brand: WATTS.
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/2 in x 1 1/2 in, Copper Silicon Alloy (MPN 0121544). Key specifications — Brand: WATTS.
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121522). Key specifications — Brand: WATTS.
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121522). Key specifications — Brand: WATTS.
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121514). Key specifications — Brand: WATTS.
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN 0121514). Key specifications — Brand: WATTS.
WATTS Relief Valve: FNPTF x FNPTF, 1 1/2 in x 1 1/2 in, Copper Silicon Alloy, 9 1/4 in Overall Ht (MPN 1-1/2 LF174A 150 FS). Key specifications — Brand: WATTS.
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 1/2 in x 1 1/2 in, Copper Silicon Alloy, 9 1/4 in Overall Ht (MPN 1-1/2 LF174A 150 FS). Key specifications — Brand: WATTS.
WATTS Pressure Relief Valve: FNPTF x FNPTF, 2 in x 2 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 0384242). Key specifications — Brand: WATTS.
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 2 in x 2 1/2 in, Iron, 75 psi Max. Op Pressure (MPN 0384242). Key specifications — Brand: WATTS.

More from Watts

View all Watts parts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 in x 1 in, Copper Silicon Alloy, 5 3/4 in Overall Ht (MPN 0121494). Key specifications — Brand: WATTS.
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 in x 1 in, Copper Silicon Alloy, 5 3/4 in Overall Ht (MPN 0121494). Key specifications — Brand: WATTS.
WATTS Relief Valve: FNPT x FNPT, 1 in x 1 in, Bronze, 94 psi Max. Op Pressure, 5 3/4 in Overall Ht (MPN 1 174A 125 FS). Key specifications — Brand: WATTS.
Watts
WATTS Relief Valve: FNPT x FNPT, 1 in x 1 in, Bronze, 94 psi Max. Op Pressure, 5 3/4 in Overall Ht (MPN 1 174A 125 FS). Key specifications — Brand: WATTS.
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN F121524). Key specifications — Brand: WATTS.
Watts
WATTS Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/4 in, Copper Silicon Alloy (MPN F121524). Key specifications — Brand: WATTS.
WATTS Boiler Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron, 8 3/4 in Overall Ht (MPN 0383310). Key specifications — Brand: WATTS.
Watts
WATTS Boiler Pressure Relief Valve: FNPTF x FNPTF, 1 1/4 in x 1 1/2 in, Iron, 8 3/4 in Overall Ht (MPN 0383310). Key specifications — Brand: WATTS.
WATTS Pressure Relief Valve: NPTF x NPTF, 3/4 in x 3/4 in, Bronze, 125 psi Max. Op Pressure (MPN 0369010). Key specifications — Brand: WATTS.
Watts
WATTS Pressure Relief Valve: NPTF x NPTF, 3/4 in x 3/4 in, Bronze, 125 psi Max. Op Pressure (MPN 0369010). Key specifications — Brand: WATTS.
WATTS Relief Valve: FNPTF x FNPTF, 1 in x 1 in, Copper Silicon Alloy, 150 psi Max. Op Pressure (MPN 1 LF174A 150 FS). Key specifications — Brand: WATTS.
Watts
WATTS Relief Valve: FNPTF x FNPTF, 1 in x 1 in, Copper Silicon Alloy, 150 psi Max. Op Pressure (MPN 1 LF174A 150 FS). Key specifications — Brand: 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). Key specifications — Brand: WATTS.
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). Key specifications — Brand: WATTS.
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 100 FS). Key specifications — Brand: WATTS.
Watts
WATTS Relief Valve: FNPTF x FNPTF, 3/4 in x 3/4 in, Bronze, 150 psi Max. Op Pressure (MPN 3/4 174A 100 FS). Key specifications — Brand: WATTS.