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Watts Double Check Valve Assembly: 757, 4 in Pipe Size, Flange x Flange, 33.75 in Overall Lg - Watts Double Check Backflow Preventers
WattsWatts Double Check Backflow Preventers

Watts Double Check Valve Assembly: 757, 4 in Pipe Size, Flange x Flange, 33.75 in Overall Lg

The Watts 757 Double Check Valve Assembly is a 4-inch backflow preventer with flange x flange connections and an OSY gate valve shut-off. This assembly, identified by MPN 4 757 OSY, measures 33.75 inches in overall…

SKU 3G-OTH-434586

Also listed as: 4757OSY · 4-757-OSY

Brand
Watts
Item
Double Check Valve Assembly: 757, 4 in Pipe Size, Flange x Flange, 33.75 in Overall Lg
Category
Watts Double Check Backflow Preventers
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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
4 757 OSY
Type
Flange x Flange, PPO
Overall Lg
33.75 in
Pipe Size
4 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 4-inch backflow preventer with flange x flange connections and an OSY gate valve shut-off. This assembly, identified by MPN 4 757 OSY, measures 33.75 inches in overall length and is constructed from PPO.

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 757 Double Check Valve Assembly used for?

The Watts 757 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 applications where continuous water pressure is required, such as fire sprinkler systems and irrigation lines.

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

The Watts 757 Double Check Valve Assembly has a 4-inch pipe size with flange x flange connections and an OSY gate valve shut-off. It measures 33.75 inches overall length, is constructed from PPO, and carries MPN 4 757 OSY. This Watts assembly is designed for backflow prevention in low-hazard water systems.

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

You can source the Watts 757 Double Check Valve Assembly worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this Watts backflow preventer.

How to install the Watts 757 Double Check Valve Assembly?

Install the Watts 757 Double Check Valve Assembly in a horizontal position with the flow arrow aligned. Ensure flange gaskets are properly seated and bolts are torqued evenly. After installation, test the assembly per local codes to verify proper check valve operation and no leakage. Always follow Watts installation guidelines.

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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