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Watts LF07S Dual Check Backflow Preventer, 1 in, FNPT x FNPT, 55 gpm - Fire Sprinkler System Dual Check Backflow Preventers
WattsFire Sprinkler System Dual Check Backflow Preventers

Watts LF07S Dual Check Backflow Preventer, 1 in, FNPT x FNPT, 55 gpm

The WATTS LF07S is a fire sprinkler system dual check backflow preventer with a 1 in pipe size and FNPT x FNPT connections. It has a 55 gpm flow rate and an overall length of 6.75 in. This model, MPN 1 LF07S, is…

SKU 3G-OTH-443262

Also listed as: 1LF07S · 1-LF07S

Brand
Watts
Item
LF07S Dual Check Backflow Preventer, 1 in, FNPT x FNPT, 55 gpm
Part Number
1 LF07S
Category
Fire Sprinkler System Dual Check Backflow Preventers
Available to Order
Also known as:1 LF07SWatts
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Technical Specifications

Watts
Manufacturer Part Number
1 LF07S
Type
FNPT x FNPT
Overall Lg
6.75 in
Pipe Size
1 in
Flow Rate
55 gpm
Connection Type
FNPT x FNPT

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

Product Description

The WATTS LF07S is a fire sprinkler system dual check backflow preventer with a 1 in pipe size and FNPT x FNPT connections. It has a 55 gpm flow rate and an overall length of 6.75 in. This model, MPN 1 LF07S, is designed for backflow prevention in fire sprinkler applications.

Frequently Asked Questions

What is the WATTS LF07S backflow preventer used for?

The WATTS LF07S is a dual check backflow preventer designed for fire sprinkler systems. It prevents contaminated water from flowing backward into the potable water supply, ensuring safety in commercial and industrial fire protection applications.

What are the specifications of the WATTS LF07S?

The WATTS LF07S has a 1 in pipe size with FNPT x FNPT connections, a 55 gpm flow rate, and an overall length of 6.75 in. The manufacturer part number is 1 LF07S. It is a dual check backflow preventer for fire sprinkler systems.

Where to buy the WATTS LF07S worldwide?

3G Electric supplies the WATTS LF07S backflow preventer 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.

How to install the WATTS LF07S backflow preventer?

Install the WATTS LF07S in a horizontal or vertical position with flow direction matching the arrow on the body. Use thread sealant on FNPT connections and ensure proper support. Follow local plumbing codes and test the device after installation per manufacturer guidelines.

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 fire sprinkler system dual 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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Compatible alternatives & equivalents

Cross-referenced by specification & description
Watts 1/2 LFN9-C dual check backflow preventer for potable water systems. Features 1/2 inch FNPT x FNPT connections, 7 gpm flow rate, and 2.38 inch overall length. Used to prevent backflow in cross-connections such as irrigation or boiler feed lines
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Watts 1/2 LFN9-C dual check backflow preventer for potable water systems. Features 1/2 inch FNPT x FNPT connections, 7 gpm flow rate, and 2.38 inch overall length. Used to prevent backflow in cross-connections such as irrigation or boiler feed lines
The Watts LF7 is a dual check backflow preventer for potable water systems, featuring a 3/8 in pipe size with FNPT x FNPT connections. It has a flow rate of 10 gpm and an overall length of 2.88 in. This device is used to protect drinking water supplies from contamination due to backflow in branch lines serving fixtures such as hose bibbs or boiler fill valves
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The Watts LF7 is a dual check backflow preventer for potable water systems, featuring a 3/8 in pipe size with FNPT x FNPT connections. It has a flow rate of 10 gpm and an overall length of 2.88 in. This device is used to protect drinking water supplies from contamination due to backflow in branch lines serving fixtures such as hose bibbs or boiler fill valves
Double check backflow preventer with 1-1/2 in FNPT x FNPT connections and ball valve shut-off. Overall length 21.75 in. Temperature range 33°F – 180°F. Used in commercial and industrial water systems to prevent backflow in non-hazardous conditions, such as fire sprinkler, irrigation, and process water lines
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Double check backflow preventer with 1-1/2 in FNPT x FNPT connections and ball valve shut-off. Overall length 21.75 in. Temperature range 33°F – 180°F. Used in commercial and industrial water systems to prevent backflow in non-hazardous conditions, such as fire sprinkler, irrigation, and process water lines
Watts LF7R dual check backflow preventer for potable water systems. Features 3/4 in pipe size with True Union FNPT connections, 15.5 gpm flow rate, brass body, and EPDM seals. Used in residential and commercial plumbing to prevent backflow contamination
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Watts LF7R dual check backflow preventer for potable water systems. Features 3/4 in pipe size with True Union FNPT connections, 15.5 gpm flow rate, brass body, and EPDM seals. Used in residential and commercial plumbing to prevent backflow contamination

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