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Watts Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor - Watts RPZ Backflow Preventers
WattsWatts RPZ Backflow Preventers

Watts Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor

The Watts LF909 Large is a reduced pressure zone (RPZ) backflow preventer from the Watts RPZ Backflow Preventers product line. This model (SKU 793PG2, MPN LF909-DOSY-FS) features a cast iron body with flange…

SKU 3G-OTH-444410

Brand
Watts
Item
Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor
Category
Watts RPZ Backflow Preventers
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Technical Specifications

Watts
Manufacturer Part Number
LF909-DOSY-FS
Type
with Flood Detection Sensor, Cast Iron, Flange
Connection Type
Flange
Shut-Off Valve Type
OSY Gate Valve
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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Watts LF909 Large is a reduced pressure zone (RPZ) backflow preventer from the Watts RPZ Backflow Preventers product line. This model (SKU 793PG2, MPN LF909-DOSY-FS) features a cast iron body with flange connections and includes an OSY gate valve shut-off valve and a flood detection sensor.

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 rpz 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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WATTS Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor, Cast Iron, Flange (MPN LF909-DOSY-FS). Key specifications — Shut-Off Valve Type: OSY Gate Valve; Connection Type: Flange.
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WATTS Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor, Cast Iron, Flange (MPN LF909-DOSY-FS). Key specifications — Shut-Off Valve Type: OSY Gate Valve; Connection Type: Flange.
WATTS Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor, Cast Iron, Flange (MPN LF909-DOSY-FS). Key specifications — Shut-Off Valve Type: OSY Gate Valve; Connection Type: Flange.
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WATTS Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor, Cast Iron, Flange (MPN LF909-DOSY-FS). Key specifications — Shut-Off Valve Type: OSY Gate Valve; Connection Type: Flange.
WATTS Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor, Cast Iron, Flange (MPN LF909-DOSY-FS). Key specifications — Shut-Off Valve Type: OSY Gate Valve; Connection Type: Flange.
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WATTS Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor, Cast Iron, Flange (MPN LF909-DOSY-FS). Key specifications — Shut-Off Valve Type: OSY Gate Valve; Connection Type: Flange.
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WATTS Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor, Cast Iron, Flange (MPN LF909M1-DOSY-FS). Key specifications — Shut-Off Valve Type: OSY Gate Valve; Connection Type: Flange.
WATTS Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor, Cast Iron, Flange (MPN LF909-DNRS-FS). Key specifications — Shut-Off Valve Type: NRS Gate Valve; Connection Type: Flange.
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WATTS Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor, Cast Iron, Flange (MPN LF909-DNRS-FS). Key specifications — Shut-Off Valve Type: NRS Gate Valve; Connection Type: Flange.
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