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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 (MPN LF909M1-DOSY-FS) features a cast iron body, flange connections, and an…

SKU 3G-OTH-444375

Also listed as: LF909M1DOSYFS · LF909M1 DOSY FS

Brand
Watts
Item
Reduced Pressure Zone Assembly: LF909 Large, with Flood Detection Sensor
Category
Watts RPZ Backflow Preventers
Available to Order
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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
LF909M1-DOSY-FS
Type
with Flood Detection Sensor, Cast Iron, Flange
Connection Type
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 LF909 Large is a reduced pressure zone (RPZ) backflow preventer from the Watts RPZ Backflow Preventers product line. This model (MPN LF909M1-DOSY-FS) features a cast iron body, flange connections, and an OSY gate valve shut-off type, and includes a flood detection sensor.

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 LF909 Large RPZ backflow preventer used for?

The Watts LF909 Large reduced pressure zone assembly is used to protect potable water supplies from backflow contamination in commercial, industrial, and municipal applications. It is suitable for high-hazard cross-connections where continuous protection is required, such as in irrigation systems, fire lines, and process water lines.

What are the specifications of the Watts LF909M1-DOSY-FS?

The Watts LF909M1-DOSY-FS is a reduced pressure zone assembly with a cast iron body, flange connections, and an OSY gate valve shut-off type. It includes a flood detection sensor for leak monitoring. The manufacturer part number is LF909M1-DOSY-FS. This model is part of the Watts RPZ Backflow Preventers product line.

Where to buy the Watts LF909 Large RPZ backflow preventer worldwide?

You can source the Watts LF909 Large RPZ backflow preventer through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this model (MPN LF909M1-DOSY-FS).

How to install a Watts LF909 RPZ backflow preventer?

Install the Watts LF909 RPZ assembly in a horizontal position with adequate clearance for testing and maintenance. Ensure the flood detection sensor is connected per the manufacturer's instructions. Use flange gaskets and bolts rated for the system pressure. Always follow local plumbing codes and the Watts installation manual for proper operation.

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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