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

3G Electric
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 10-inch double check valve assembly from the Watts Double Check Backflow Preventers product line. It features flange x flange connections and is equipped with NRS gate valve shut-off valves…

SKU 3G-OTH-434607

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
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

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
90.44 in
Pipe Size
10 in
Connection Type
Flange x Flange
Shut-Off Valve Type
NRS Gate Valve

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

Product Description

The Watts LF709-NRS is a 10-inch double check valve assembly from the Watts Double Check Backflow Preventers product line. It features flange x flange connections and is equipped with NRS gate valve shut-off valves. This assembly has an overall length of 90.44 inches.

Frequently Asked Questions

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

The Watts LF709-NRS is a 10-inch double check valve assembly used in commercial and industrial backflow prevention systems. It protects potable water supplies from contamination by preventing reverse flow in high-hazard cross-connections, typically in fire sprinkler, irrigation, and process water lines.

What are the specifications of the Watts LF709-NRS double check valve assembly?

The Watts LF709-NRS has a 10-inch pipe size, flange x flange connections, and an overall length of 90.44 inches. It features NRS gate valve shut-off valves and is part of the Watts 709 series double check backflow preventers. The manufacturer part number is LF709-NRS.

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

3G Electric supplies the Watts LF709-NRS double check valve assembly worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this 10-inch flange x flange backflow preventer.

How to install the Watts LF709-NRS double check valve assembly?

Install the Watts LF709-NRS in a horizontal or vertical orientation with adequate clearance for servicing. Ensure flange gaskets are properly aligned and bolts torqued to manufacturer specifications. Always install downstream of the shut-off valve and test per local backflow prevention codes 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
Not sure this is the right part? Photo-identify it

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from Watts

View all Watts parts
Double check backflow preventer with 1-1/2 in FNPT x FNPT connections and ball valve shut-off. Overall length 21.75 in. Temperature range 33°F – 180°F. Used in commercial and industrial water systems to prevent backflow in non-hazardous conditions, such as fire sprinkler, irrigation, and process water lines
Watts
Double check backflow preventer with 1-1/2 in FNPT x FNPT connections and ball valve shut-off. Overall length 21.75 in. Temperature range 33°F – 180°F. Used in commercial and industrial water systems to prevent backflow in non-hazardous conditions, such as fire sprinkler, irrigation, and process water lines
Double check backflow preventer with 1 1/4 in FNPT x FNPT connections and ball valve shut-off. Temperature range 33°F – 180°F, overall length 16.38 in. Used in water systems to prevent backflow where non-health-hazard cross-connections exist
Watts
Double check backflow preventer with 1 1/4 in FNPT x FNPT connections and ball valve shut-off. Temperature range 33°F – 180°F, overall length 16.38 in. Used in water systems to prevent backflow where non-health-hazard cross-connections exist
This double check backflow preventer features a bronze body with 1 1/4 in FNPT x FNPT connections and a ball valve shut-off. It is used to prevent reverse flow in low-hazard cross-connections under continuous pressure in commercial and industrial plumbing systems
Watts
This double check backflow preventer features a bronze body with 1 1/4 in FNPT x FNPT connections and a ball valve shut-off. It is used to prevent reverse flow in low-hazard cross-connections under continuous pressure in commercial and industrial plumbing systems

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first