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Watts 1-1/4 LF174A 125 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 125 FS ASME Section XIII Hot Water Pressure Relief Valve

The WATTS Relief Valve (MPN 1-1/4 LF174A 125 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, constructed from copper silicon alloy, and featuring…

SKU 3G-OTH-442491

Also listed as: 114LF174A125FS · 1 1 4 LF174A 125 FS · 1-1-4-LF174A-125-FS

Brand
Watts
Item
1-1/4 LF174A 125 FS ASME Section XIII Hot Water Pressure Relief Valve
Part Number
1-1/4 LF174A 125 FS
Category
ASME Section XIII Hot Water Pressure Relief Valves
Available to Order
Also known as:1-1/4 LF174A 125 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 125 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 125 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, constructed from copper silicon alloy, and featuring an overall height of 8 1/2 in.

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 designed to protect water heaters and storage tanks from overpressure. It automatically opens when pressure exceeds the set limit, preventing system damage. Common in commercial and industrial hot water systems.

What are the specifications of the Watts 1-1/4 LF174A 125 FS?

This Watts relief valve has 1 1/4 inch FNPTF x FNPTF connections, a copper silicon alloy body, and an overall height of 8 1/2 inches. It is rated for ASME Section XIII hot water service. The manufacturer part number is 1-1/4 LF174A 125 FS.

Where to buy Watts relief valves worldwide?

3G Electric supplies Watts relief valves worldwide, handling full logistics and customs clearance for global delivery. As a sourcing partner, we provide the Watts LF174A and other models to industrial buyers. Contact us for availability and lead time to your location.

How to install a Watts LF174A relief valve?

Install the Watts LF174A in the hot water system's tapping, ensuring the valve body is upright and discharge piping is directed to a safe drain. Use thread sealant on the FNPTF connections. Follow local codes and the manufacturer's instructions for proper pressure setting and testing.

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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