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Watts LF709-OSY Double Check Backflow Preventer - Watts Double Check Backflow Preventers
WattsWatts Double Check Backflow Preventers

Watts LF709-OSY Double Check Backflow Preventer

The Watts LF709 Double Check Valve Assembly is a 6-inch backflow preventer with flange x flange connections and an OSY gate valve shut-off. This model, part number LF709-OSY, measures 62.94 inches in overall length.

SKU 3G-OTH-434602

Also listed as: LF709OSY · LF709 OSY

Brand
Watts
Item
LF709-OSY Double Check Backflow Preventer
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 — 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-OSY
Type
Flange x Flange, 709
Overall Lg
62.94 in
Pipe Size
6 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 LF709 Double Check Valve Assembly is a 6-inch backflow preventer with flange x flange connections and an OSY gate valve shut-off. This model, part number LF709-OSY, measures 62.94 inches in overall length.

Frequently Asked Questions

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

The Watts LF709 double check valve assembly prevents backflow of non-potable water into potable water supplies. It is used in commercial and industrial plumbing systems, irrigation, and fire protection to protect drinking water from contamination.

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

The Watts LF709-OSY is a 6-inch double check valve assembly with flange x flange connections. It has an overall length of 62.94 inches and features an OSY gate valve shut-off. The manufacturer part number is LF709-OSY.

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

3G Electric supplies the Watts LF709 double check valve assembly worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this backflow preventer.

How to install a Watts LF709 double check valve assembly?

Install the Watts LF709 in a horizontal or vertical position with flow arrow aligned. Ensure flange connections are properly gasketed and bolted. Test the assembly per local codes after installation. Always follow manufacturer guidelines for safe operation.

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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