We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
Watts 1 in FNPT x MNPT Dual Check Backflow Preventer, 26 gpm, EPDM, LF7R Series - Potable Water Dual Check Backflow Preventers
WattsPotable Water Dual Check Backflow Preventers

Watts 1 in FNPT x MNPT Dual Check Backflow Preventer, 26 gpm, EPDM, LF7R Series

The WATTS LF7R is a potable water dual check backflow preventer with a 1 in pipe size and FNPT x MNPT connections. It has a flow rate of 26 gpm and an overall length of 1 in, with EPDM seals. This model is identified…

SKU 3G-OTH-437191

Also listed as: 1X34LF7RU43 · 1X3 4 LF7RU4 3 · 1X3-4-LF7RU4-3

Brand
Watts
Item
1 in FNPT x MNPT Dual Check Backflow Preventer, 26 gpm, EPDM, LF7R Series
Part Number
1X3/4 LF7RU4-3
Category
Potable Water Dual Check Backflow Preventers
Available to Order
Also known as:1X3/4 LF7RU4-3Watts
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Watts
Manufacturer Part Number
1X3/4 LF7RU4-3
Type
FNPT x MNPT, EPDM
Overall Lg
1 in
Pipe Size
1 in
Flow Rate
26 gpm
Connection Type
FNPT x MNPT

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The WATTS LF7R is a potable water dual check backflow preventer with a 1 in pipe size and FNPT x MNPT connections. It has a flow rate of 26 gpm and an overall length of 1 in, with EPDM seals. This model is identified by manufacturer part number 1X3/4 LF7RU4-3.

Frequently Asked Questions

What is the WATTS LF7R backflow preventer used for?

The WATTS LF7R is a potable water dual check backflow preventer designed to protect drinking water supplies from contamination due to backflow. It is commonly installed in residential and commercial plumbing systems, including irrigation and boiler feed lines, where cross-connection control is required.

What are the specifications of the WATTS LF7R backflow preventer?

The WATTS LF7R has a 1 in pipe size with FNPT x MNPT connections, a flow rate of 26 gpm, and an overall length of 1 in. It features EPDM seals and is identified by manufacturer part number 1X3/4 LF7RU4-3. This model is suitable for potable water applications.

Where to buy the WATTS LF7R backflow preventer worldwide?

3G Electric supplies the WATTS LF7R backflow preventer worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this model to any country.

How to install the WATTS LF7R backflow preventer?

Install the WATTS LF7R in a horizontal or vertical position with flow arrow pointing downstream. Ensure pipe threads are clean and use thread sealant on male NPT connections. Support the valve body to avoid stress. Test per local codes after installation. Always follow manufacturer guidelines for proper operation.

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
Not sure this is the right part? Photo-identify it

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from Watts

View all Watts parts
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
Watts
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
Watts
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
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
Watts
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

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first