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Watts 2 LF919-QT-S-FS Reduced Pressure Zone Assembly with Flood - Watts RPZ Backflow Preventers
WattsWatts RPZ Backflow Preventers

Watts 2 LF919-QT-S-FS Reduced Pressure Zone Assembly with Flood

The Watts LF919 Reduced Pressure Zone Assembly is a Watts RPZ Backflow Preventer with a 2 in pipe size, featuring a Flood Detection Sensor and Strainer. It includes a Ball Valve shut-off valve and FNPT connection…

SKU 3G-OTH-444397

Also listed as: 2LF919QTSFS · 2 LF919 QT S FS · 2-LF919-QT-S-FS

Brand
Watts
Item
2 LF919-QT-S-FS Reduced Pressure Zone Assembly with Flood
Part Number
2 LF919-QT-S-FS
Category
Watts RPZ Backflow Preventers
Available to Order
Also known as:2 LF919-QT-S-FSWatts
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Watts
Manufacturer Part Number
2 LF919-QT-S-FS
Type
With Flood Detection Sensor & Strainer
Pipe Size
2 in
Connection Type
FNPT
Shut-Off Valve Type
Ball Valve

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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Watts LF919 Reduced Pressure Zone Assembly is a Watts RPZ Backflow Preventer with a 2 in pipe size, featuring a Flood Detection Sensor and Strainer. It includes a Ball Valve shut-off valve and FNPT connection type, as specified by the manufacturer part number 2 LF919-QT-S-FS.

Frequently Asked Questions

What is the Watts LF919 Reduced Pressure Zone Assembly used for?

The Watts LF919 Reduced Pressure Zone Assembly is a backflow preventer used in commercial and industrial water systems to protect potable water supplies from contamination due to backflow. It is commonly installed in irrigation, fire sprinkler, and process water lines where cross-connection hazards exist.

What are the specifications of the Watts LF919 RPZ with flood detection sensor?

The Watts LF919 Reduced Pressure Zone Assembly has a 2 in pipe size, FNPT connection type, and a ball valve shut-off valve. It includes a flood detection sensor and strainer. The manufacturer part number is 2 LF919-QT-S-FS. This Watts RPZ backflow preventer is designed for reliable backflow protection in demanding applications.

Where to buy the Watts LF919 RPZ backflow preventer worldwide?

3G Electric supplies the Watts LF919 Reduced Pressure Zone Assembly worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on the Watts LF919 RPZ with flood detection sensor and strainer.

How to install a Watts LF919 Reduced Pressure Zone Assembly?

Install the Watts LF919 RPZ in a horizontal position with adequate clearance for testing and maintenance. Ensure the flood detection sensor is properly connected per the manufacturer's instructions. Use pipe thread sealant on FNPT connections and support the assembly to prevent stress on the valve body. Always follow local plumbing codes.

Used in

Common applications for Watts
Commercial plumbing – Watts standard capacity water pressure regulators (3/8 LF 26AB) for stabilizing incoming water pressure
Industrial steam systems – Watts 152A series steam pressure regulators for pressure reduction in process and heating lines
Cross-connection control – Watts 757 double check backflow preventers for commercial and industrial water supply protection
Boiler safety – Watts ASME Section XIII temperature and pressure relief valves for overpressure protection in heating systems
Hydronic heating – Watts CP16 pilot-operated pressure regulators for maintaining consistent pressure in steam or water loops
Water hammer mitigation – Watts LF15M2-A water hammer arrestors for absorbing surges in quick-closing valve applications
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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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