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
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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.
Used in
Common applications for WattsIndustrial 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.
