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WATTS RELIEF VALVE: FNPTF x FNPTF, 1 in x 1 in, Copper Silicon Alloy - ASME Section IV Hot Water Pressure Relief Valves
WattsASME Section IV Hot Water Pressure Relief Valves

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

The Watts 406KK2 is an ASME Section IV hot water pressure relief valve with 1 in x 1 in FNPTF connections, constructed from copper silicon alloy. It has a maximum operating pressure of 150 psi (MPN F121504). 3G…

SKU 3G-OTH-429342

Brand
Watts
Item
RELIEF VALVE: FNPTF x FNPTF, 1 in x 1 in, Copper Silicon Alloy
Category
ASME Section IV Hot Water Pressure Relief Valves
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Technical Specifications

Watts
Manufacturer Part Number
F121504
Type
1 in x 1 in, Copper Silicon Alloy
Max. Op Pressure
150 psi
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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Watts 406KK2 is an ASME Section IV hot water pressure relief valve with 1 in x 1 in FNPTF connections, constructed from copper silicon alloy. It has a maximum operating pressure of 150 psi (MPN F121504). 3G Electric interprets 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 the Watts F121504 relief valve used for?

The Watts F121504 is an ASME Section IV hot water pressure relief valve used in commercial and residential hydronic heating systems. It automatically opens to discharge excess pressure above 150 psi, protecting boilers and water heaters from overpressure damage. The 1-inch FNPTF connections suit standard piping configurations.

What are the specifications of the Watts F121504 relief valve?

The Watts F121504 has a maximum operating pressure of 150 psi, with 1-inch FNPTF female threaded connections on both inlet and outlet. The body is made of copper silicon alloy for corrosion resistance. It is an ASME Section IV rated hot water pressure relief valve, manufactured by Watts under part number F121504.

Where to buy the Watts F121504 relief valve worldwide?

3G Electric supplies the Watts F121504 relief valve to customers worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact our team to place an order or request a quote for international shipping.

How to install the Watts F121504 relief valve?

Install the Watts F121504 in the hot water outlet line of the boiler or water heater, ensuring the valve's pressure rating matches the system. Use thread sealant on the 1-inch FNPTF connections and orient the discharge pipe downward to a safe drain location. Test operation after installation by manually lifting the lever.

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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