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Watts 757 OSY 6 Double Check Backflow Preventer, 6 in, Flange x Flange, Plastic - Watts Double Check Backflow Preventers
WattsWatts Double Check Backflow Preventers

Watts 757 OSY 6 Double Check Backflow Preventer, 6 in, Flange x Flange, Plastic

The Watts 757 Double Check Valve Assembly is a backflow preventer with a 6-inch pipe size and flange x flange connections. It features an OSY gate valve shut-off type and has an overall length of 43.5 inches, with a…

SKU 3G-OTH-434590

Also listed as: 757OSY6 · 757-OSY-6

Brand
Watts
Item
757 OSY 6 Double Check Backflow Preventer, 6 in, Flange x Flange, Plastic
Part Number
757 OSY 6
Category
Watts Double Check Backflow Preventers
Available to Order
Also known as:757 OSY 6Watts
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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
757 OSY 6
Type
Flange x Flange, Plastic
Overall Lg
43.5 in
Pipe Size
6 in
Connection Type
Flange x Flange
Shut-Off Valve Type
OSY Gate Valve

Technical Documents

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

Product Description

The Watts 757 Double Check Valve Assembly is a backflow preventer with a 6-inch pipe size and flange x flange connections. It features an OSY gate valve shut-off type and has an overall length of 43.5 inches, with a plastic construction.

Frequently Asked Questions

What is the Watts 757 Double Check Valve Assembly used for?

The Watts 757 Double Check Valve Assembly prevents backflow of non-potable water into potable water supplies in commercial and industrial plumbing systems. It is commonly installed in fire sprinkler, irrigation, and process water lines where a high-hazard backflow condition does not exist.

What are the specifications of the Watts 757 Double Check Valve Assembly?

The Watts 757 has a 6-inch pipe size with flange x flange connections and an OSY gate valve shut-off type. Overall length is 43.5 inches, and the body is plastic. The manufacturer part number is 757 OSY 6. It is a double check backflow preventer assembly.

Where to buy the Watts 757 Double Check Valve Assembly worldwide?

3G Electric supplies the Watts 757 Double Check Valve Assembly worldwide. As a global industrial sourcing partner, 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 757 Double Check Valve Assembly?

Install the Watts 757 in a horizontal or vertical position with the flow arrow pointing downstream. Ensure flange gaskets are properly seated and bolts are torqued evenly. Provide adequate clearance for servicing the OSY gate valve and test cocks. Always follow local plumbing codes.

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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