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Watts Double Check Valve Assembly: LF709, 2 1/2 in Pipe Size, Flange x Flange - Watts Double Check Backflow Preventers
WattsWatts Double Check Backflow Preventers

Watts Double Check Valve Assembly: LF709, 2 1/2 in Pipe Size, Flange x Flange

The WATTS Double Check Valve Assembly: LF709 is a Watts Double Check Backflow Preventer featuring a flange x flange connection and an OSY gate valve shut-off valve type. This model, with manufacturer part number…

SKU 3G-OTH-434576

Also listed as: LF709OSY · LF709 OSY

Brand
Watts
Item
Double Check Valve Assembly: LF709, 2 1/2 in Pipe Size, Flange x Flange
Category
Watts Double Check Backflow Preventers
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Watts
Manufacturer Part Number
LF709-OSY
Type
Flange x Flange
Overall Lg
39.44 in
Pipe Size
2 1/2 in
Connection Type
Flange x Flange
Shut-Off Valve Type
OSY Gate Valve

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

Product Description

The WATTS Double Check Valve Assembly: LF709 is a Watts Double Check Backflow Preventer featuring a flange x flange connection and an OSY gate valve shut-off valve type. This model, with manufacturer part number LF709-OSY, has a 2 1/2 inch pipe size and an overall length of 39.44 inches.

Frequently Asked Questions

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

The Watts LF709 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 suitable for low-hazard cross-connections and is commonly installed in irrigation, fire sprinkler, and water main applications.

What are the specifications of the Watts LF709-OSY backflow preventer?

The Watts LF709-OSY double check valve assembly has a 2 1/2 in pipe size, flange x flange connection, and an overall length of 39.44 in. It features an OSY gate valve shut-off type and is manufactured by Watts under part number LF709-OSY.

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

3G Electric supplies the Watts LF709 double check valve assembly worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this Watts backflow preventer.

How to install a Watts double check valve assembly?

Install the Watts double check valve assembly in a horizontal or vertical position with flow direction matching the arrow on the body. Ensure adequate clearance for maintenance and testing. Flange connections require proper gaskets and bolting per local plumbing codes. Always consult the manufacturer's installation manual.

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 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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