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Watts LFN9-3/8" Continuous Pressure Dual Check Backflow Preventer - Continuous Pressure Dual Check Backflow Preventers
WattsContinuous Pressure Dual Check Backflow Preventers

Watts LFN9-3/8" Continuous Pressure Dual Check Backflow Preventer

The WATTS LFN9 is a continuous pressure dual check backflow preventer with an atmospheric vent, available in a 3/8-inch pipe size with FNPT x FNPT connections. This brass unit has a flow rate of 7 gpm and is…

SKU 3G-OTH-430228

Also listed as: LFN938 · LFN9 3 8 · LFN9-3-8

Brand
Watts
Item
LFN9-3/8" Continuous Pressure Dual Check Backflow Preventer
Part Number
LFN9-3/8"
Category
Continuous Pressure Dual Check Backflow Preventers
Available to Order
Also known as:LFN9-3/8"Watts
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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
LFN9-3/8"
Type
FNPT x FNPT, Brass
Pipe Size
3/8 in
Flow Rate
7 gpm
Connection Type
FNPT x FNPT

Technical Documents

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3G Electric (S) Pte. Ltd. — Singapore

Product Description

The WATTS LFN9 is a continuous pressure dual check backflow preventer with an atmospheric vent, available in a 3/8-inch pipe size with FNPT x FNPT connections. This brass unit has a flow rate of 7 gpm and is identified by manufacturer part number LFN9-3/8".

Frequently Asked Questions

What is the WATTS LFN9 dual check backflow preventer used for?

The WATTS LFN9 is a continuous pressure dual check backflow preventer with an atmospheric vent, used to protect potable water supplies from contamination in commercial and industrial plumbing systems. It prevents reverse flow under continuous pressure conditions.

What are the specifications of the WATTS LFN9-3/8"?

The WATTS LFN9-3/8" has a 3/8 in pipe size, FNPT x FNPT connections, a flow rate of 7 gpm, and is constructed from brass. It is designed for continuous pressure applications and includes an atmospheric vent for added protection.

Where to buy the WATTS LFN9 backflow preventer worldwide?

3G Electric supplies the WATTS LFN9 dual check backflow preventer to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this brass unit with FNPT connections.

How to install a WATTS LFN9 dual check valve?

Install the WATTS LFN9 in a horizontal or vertical position with flow arrow pointing downstream. Ensure the atmospheric vent is unobstructed and above grade. Use pipe thread sealant on FNPT connections and test per local codes after installation.

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 continuous pressure 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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Brass dual check backflow preventer with atmospheric vent for continuous pressure service. 1/4 in FNPT x FNPT connections, 7 gpm flow rate. Used in potable water systems to prevent backflow contamination
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Brass dual check backflow preventer with atmospheric vent for continuous pressure service. 1/4 in FNPT x FNPT connections, 7 gpm flow rate. Used in potable water systems to prevent backflow contamination

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