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Watts LF709-NRS Double Check Valve Assembly - Watts Double Check Backflow Preventers
WattsWatts Double Check Backflow Preventers

Watts LF709-NRS Double Check Valve Assembly

The Watts LF709-NRS is a 4-inch double check valve assembly from the Watts Double Check Backflow Preventers product line, featuring flange x flange connections and an NRS gate valve shut-off type. This assembly…

SKU 3G-OTH-434603

Also listed as: LF709NRS · LF709 NRS

Brand
Watts
Item
LF709-NRS Double Check Valve Assembly
Part Number
LF709-NRS
Category
Watts Double Check Backflow Preventers
Available to Order
Also known as:LF709-NRSWatts
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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
LF709-NRS
Type
Flange x Flange, 709
Overall Lg
52.38 in
Pipe Size
4 in
Connection Type
Flange x Flange
Shut-Off Valve Type
NRS Gate Valve

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

Product Description

The Watts LF709-NRS is a 4-inch double check valve assembly from the Watts Double Check Backflow Preventers product line, featuring flange x flange connections and an NRS gate valve shut-off type. This assembly measures 52.38 inches in overall length and is identified by manufacturer part number LF709-NRS.

Frequently Asked Questions

What is the Watts LF709-NRS double check valve assembly used for?

The Watts LF709-NRS double check valve assembly is used to prevent backflow of non-potable water into potable water supplies in commercial and industrial plumbing systems. It is commonly installed in irrigation, fire sprinkler, and process water lines to protect against cross-connection contamination.

What are the specifications of the Watts LF709 double check valve?

The Watts LF709-NRS is a 4-inch double check valve assembly with flange x flange connections and an NRS gate valve shut-off type. Its overall length is 52.38 inches. The manufacturer part number is LF709-NRS, and it is part of the Watts Double Check Backflow Preventers product line.

Where to buy the Watts LF709-NRS double check valve worldwide?

You can source the Watts LF709-NRS double check valve assembly through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this item.

How to install a Watts double check valve assembly?

Install the Watts double check valve assembly in a horizontal or vertical position with flow arrow pointing downstream. Ensure adequate clearance for servicing the NRS gate valves and test cocks. Follow local plumbing codes and the manufacturer's instructions for proper support and pressure testing after installation.

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 watts double check backflow preventers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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