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Watts Dual Check Vacuum Breaker: LFN9, 3/8 in Pipe Size, FNPT x FNPT, 7 gpm Flow Rate - Potable Water Dual Check Backflow Preventers
WattsPotable Water Dual Check Backflow Preventers

Watts Dual Check Vacuum Breaker: LFN9, 3/8 in Pipe Size, FNPT x FNPT, 7 gpm Flow Rate

The WATTS Dual Check Vacuum Breaker LFN9 is a potable water dual check backflow preventer with a 3/8 in pipe size and FNPT x FNPT connection type. It features a brass construction and a 7 gpm flow rate, as specified…

SKU 3G-OTH-437168

Also listed as: 38LFN9C38 · 3 8 LF N9C 3 8 · 3-8-LF-N9C-3-8

Brand
Watts
Item
Dual Check Vacuum Breaker: LFN9, 3/8 in Pipe Size, FNPT x FNPT, 7 gpm Flow Rate
Category
Potable Water Dual Check Backflow Preventers
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Watts
Manufacturer Part Number
3/8 LF N9C - 3/8"
Type
FNPT x FNPT, Brass, Female
Pipe Size
3/8 in
Flow Rate
7 gpm
Connection Type
FNPT x FNPT

Technical Documents

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

Product Description

The WATTS Dual Check Vacuum Breaker LFN9 is a potable water dual check backflow preventer with a 3/8 in pipe size and FNPT x FNPT connection type. It features a brass construction and a 7 gpm flow rate, as specified by the manufacturer part number 3/8 LF N9C - 3/8".

Frequently Asked Questions

What is a WATTS Dual Check Vacuum Breaker LFN9 used for?

The WATTS LFN9 dual check vacuum breaker prevents backflow of contaminated water into potable water lines. It is used in residential and commercial plumbing systems to protect drinking water from cross-connection hazards, such as hose bibbs or boiler feed lines.

What are the specifications of the WATTS LFN9 dual check vacuum breaker?

The WATTS LFN9 has a 3/8 in pipe size with FNPT x FNPT connections, a brass body, and a flow rate of 7 gpm. It is a potable water dual check backflow preventer, model 3/8 LF N9C - 3/8". These specs ensure reliable performance in low-hazard plumbing applications.

Where to buy a WATTS LFN9 dual check vacuum breaker worldwide?

3G Electric supplies the WATTS LFN9 dual check vacuum breaker to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote on this 3/8 in brass backflow preventer with FNPT connections.

How to install a WATTS dual check vacuum breaker?

Install the WATTS LFN9 in a vertical or horizontal position with the flow arrow pointing downstream. Use thread sealant on the FNPT connections and ensure the breaker is accessible for testing. Follow local plumbing codes and the manufacturer's instructions for proper backflow prevention.

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 potable water 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 Dual Check Vacuum Breaker: LFN9-CD, 3/4 in Pipe Size, FGHT x MGHT, 5 gpm Flow Rate, Brass, GHT (MPN LFN9CD)
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WATTS Dual Check Vacuum Breaker: LFN9-CD, 3/4 in Pipe Size, FGHT x MGHT, 5 gpm Flow Rate, Brass, GHT (MPN LFN9CD)
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
Continuous pressure dual check backflow preventer with atmospheric vent. 3/8 in pipe size, MNPT x FNPT connections, 5 gpm flow rate, NPT threads. Used to prevent reverse flow in potable water systems under continuous pressure
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Continuous pressure dual check backflow preventer with atmospheric vent. 3/8 in pipe size, MNPT x FNPT connections, 5 gpm flow rate, NPT threads. Used to prevent reverse flow in potable water systems under continuous pressure
The WATTS LF7 is a dual check backflow preventer for potable water systems, constructed from copper silicon alloy. It features 1-inch FNPT x FNPT connections and an overall length of 3.88 inches. This device prevents backflow caused by back-siphonage or back-pressure in plumbing applications
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The WATTS LF7 is a dual check backflow preventer for potable water systems, constructed from copper silicon alloy. It features 1-inch FNPT x FNPT connections and an overall length of 3.88 inches. This device prevents backflow caused by back-siphonage or back-pressure in plumbing applications
WATTS Dual Check with Atmospheric Vent: LFN9, 3/8 in Pipe Size, FNPT x FNPT, 7 gpm Flow Rate, Brass (MPN LFN9-3/8")
Watts
WATTS Dual Check with Atmospheric Vent: LFN9, 3/8 in Pipe Size, FNPT x FNPT, 7 gpm Flow Rate, Brass (MPN LFN9-3/8")
WATTS Dual Check with Atmospheric Vent: LFN9, 1/4 in Pipe Size, FNPT x FNPT, 7 gpm Flow Rate, Brass (MPN LFN9C-1/4")
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WATTS Dual Check with Atmospheric Vent: LFN9, 1/4 in Pipe Size, FNPT x FNPT, 7 gpm Flow Rate, Brass (MPN LFN9C-1/4")

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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
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