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Watts 1-1/4 LF174A 150 FS ASME Section XIII Hot Water Pressure Relief Valve - ASME Section XIII Hot Water Pressure Relief Valves
WattsASME Section XIII Hot Water Pressure Relief Valves

Watts 1-1/4 LF174A 150 FS ASME Section XIII Hot Water Pressure Relief Valve

The WATTS Relief Valve (MPN 1-1/4 LF174A 150 FS) is an ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections, sized 1 1/4 in x 1 1/4 in in a Copper Silicon Alloy construction and an overall…

SKU 3G-OTH-442492

Also listed as: 114LF174A150FS · 1 1 4 LF174A 150 FS · 1-1-4-LF174A-150-FS

Brand
Watts
Item
1-1/4 LF174A 150 FS ASME Section XIII Hot Water Pressure Relief Valve
Part Number
1-1/4 LF174A 150 FS
Category
ASME Section XIII Hot Water Pressure Relief Valves
Available to Order
Also known as:1-1/4 LF174A 150 FSWatts
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Watts
Manufacturer Part Number
1-1/4 LF174A 150 FS
Type
1 1/4 in x 1 1/4 in, Copper Silicon Alloy
Overall Ht
8 1/2 in

Technical Documents

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3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS Relief Valve (MPN 1-1/4 LF174A 150 FS) is an ASME Section XIII hot water pressure relief valve with FNPTF x FNPTF connections, sized 1 1/4 in x 1 1/4 in in a Copper Silicon Alloy construction and an overall height of 8 1/2 in. 3G Electric interprets customer demand and delivers this genuine industrial component across 14 departments — with specialist depth in combustion, pumps and controls — ensuring you get the right answer, not just a catalog.

Frequently Asked Questions

What is the Watts LF174A relief valve used for?

The Watts LF174A is an ASME Section XIII hot water pressure relief valve used in commercial and industrial hydronic heating systems. It protects boilers and water heaters from overpressure by automatically discharging water when pressure exceeds the set limit, ensuring safe operation.

What are the specifications of the Watts 1-1/4 LF174A 150 FS relief valve?

This Watts relief valve has 1 1/4 in FNPTF x FNPTF connections, a copper silicon alloy body, and an overall height of 8 1/2 in. The manufacturer part number is 1-1/4 LF174A 150 FS. It is designed for ASME Section XIII hot water pressure relief applications.

Where to buy Watts relief valves worldwide?

3G Electric supplies Watts relief valves worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us to source the Watts 1-1/4 LF174A 150 FS or other models for your project.

How to install a Watts LF174A relief valve?

Install the Watts LF174A in the boiler or water heater tapping with the sensing element immersed in water. Use pipe dope on male threads, avoid overtightening, and route the discharge pipe downward to a safe drain. Follow local codes and the manufacturer's instructions for proper operation.

Used in

Common applications for Watts
Commercial plumbing – Watts standard capacity water pressure regulators (3/8 LF 26AB) for stabilizing incoming water pressure
Industrial steam systems – Watts 152A series steam pressure regulators for pressure reduction in process and heating lines
Cross-connection control – Watts 757 double check backflow preventers for commercial and industrial water supply protection
Boiler safety – Watts ASME Section XIII temperature and pressure relief valves for overpressure protection in heating systems
Hydronic heating – Watts CP16 pilot-operated pressure regulators for maintaining consistent pressure in steam or water loops
Water hammer mitigation – Watts LF15M2-A water hammer arrestors for absorbing surges in quick-closing valve applications
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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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