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

Watts LF709-OSY Double Check Valve Assembly

The Watts LF709 Double Check Valve Assembly (SKU 3G-OTH-434584) is a 4-inch pipe size backflow preventer with flange x flange connections and an OSY gate valve shut-off. This assembly, model LF709-OSY, measures 52.38…

SKU 3G-OTH-434584

Also listed as: LF709OSY · LF709 OSY

Brand
Watts
Item
LF709-OSY Double Check Valve Assembly
Part Number
LF709-OSY
Category
Watts Double Check Backflow Preventers
Available to Order
Also known as:LF709-OSYWatts
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Watts
Manufacturer Part Number
LF709-OSY
Type
Flange x Flange, 709
Overall Lg
52.38 in
Pipe Size
4 in
Connection Type
Flange x Flange
Shut-Off Valve Type
OSY Gate Valve

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3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Watts LF709 Double Check Valve Assembly (SKU 3G-OTH-434584) is a 4-inch pipe size backflow preventer with flange x flange connections and an OSY gate valve shut-off. This assembly, model LF709-OSY, measures 52.38 inches in overall length and is designed for industrial backflow prevention applications.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the Watts LF709 Double Check Valve Assembly used for?

The Watts LF709 Double Check Valve Assembly is used for industrial backflow prevention, protecting potable water supplies from contamination due to backpressure or backsiphonage. It is suitable for non-health hazard cross-connections in commercial, irrigation, and industrial systems where continuous water service is required.

What are the specifications of the Watts LF709 Double Check Valve Assembly?

The Watts LF709-OSY has a 4-inch pipe size, flange x flange connections, and an OSY gate valve shut-off. Its overall length is 52.38 inches. The manufacturer part number is LF709-OSY, and it is part of the Watts 709 series double check backflow preventers.

Where to buy the Watts LF709 Double Check Valve Assembly worldwide?

You can source the Watts LF709-OSY 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 backflow preventer.

How to install the Watts LF709 Double Check Valve Assembly?

Install the Watts LF709-OSY in a horizontal position with adequate clearance for maintenance. Ensure the flange connections are properly aligned and gasketed. The OSY gate valve shut-off should be fully open during operation. Follow local plumbing codes and the manufacturer's instructions for backflow preventer 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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