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Watts Double Check Valve Assembly: 774, 4 in Pipe Size, Flange x Flange, 40 in Overall Lg - Watts Double Check Backflow Preventers
WattsWatts Double Check Backflow Preventers

Watts Double Check Valve Assembly: 774, 4 in Pipe Size, Flange x Flange, 40 in Overall Lg

The Watts 774 Double Check Valve Assembly is a flange x flange backflow preventer from Watts Double Check Backflow Preventers. This 4-inch pipe size assembly features OSY gate valve shut-off valves and has a 40-inch…

SKU 3G-OTH-434585

Brand
Watts
Item
Double Check Valve Assembly: 774, 4 in Pipe Size, Flange x Flange, 40 in Overall Lg
Category
Watts Double Check Backflow Preventers
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Technical Specifications

Watts
Manufacturer Part Number
774-OSY
Type
Flange x Flange, 774
Overall Lg
40 in
Pipe Size
4 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 774 Double Check Valve Assembly is a flange x flange backflow preventer from Watts Double Check Backflow Preventers. This 4-inch pipe size assembly features OSY gate valve shut-off valves and has a 40-inch overall length (MPN 774-OSY).

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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