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Watts 1/2 BD911T Combination Fill Valve Backflow Preventer - Combination Fill Valve Backflow Preventers
WattsCombination Fill Valve Backflow Preventers

Watts 1/2 BD911T Combination Fill Valve Backflow Preventer

The WATTS BD911 is a combination fill valve and backflow preventer designed for boiler feed applications. This bronze unit features FNPT x FNPT connections with a 1/2-inch pipe size, as indicated by the manufacturer…

SKU 3G-OTH-438458

Also listed as: 12BD911T · 1 2 BD911T · 1-2-BD911T

Brand
Watts
Item
1/2 BD911T Combination Fill Valve Backflow Preventer
Part Number
1/2 BD911T
Category
Combination Fill Valve Backflow Preventers
Available to Order
Also known as:1/2 BD911TWatts
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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
1/2 BD911T
Type
FNPT x FNPT, Bronze, Female
Pipe Size
1/2 in
Connection Type
FNPT x FNPT

Technical Documents

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

Product Description

The WATTS BD911 is a combination fill valve and backflow preventer designed for boiler feed applications. This bronze unit features FNPT x FNPT connections with a 1/2-inch pipe size, as indicated by the manufacturer part number 1/2 BD911T.

Frequently Asked Questions

What is the WATTS BD911 boiler feed valve used for?

The WATTS BD911 is a combination fill valve and backflow preventer used in boiler feed applications. It automatically fills the boiler system with water while preventing backflow contamination, making it essential for commercial and industrial hydronic heating systems.

What are the specifications of the WATTS BD911?

The WATTS BD911 has a 1/2 in pipe size with FNPT x FNPT connections. It is made of bronze and has a female connection type. The manufacturer part number is 1/2 BD911T. This unit is designed for boiler feed applications as a combination fill valve and backflow preventer.

Where to buy the WATTS BD911 worldwide?

3G Electric supplies the WATTS BD911 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 on this bronze combination fill valve and backflow preventer.

How to install the WATTS BD911 boiler feed valve?

Install the WATTS BD911 in the boiler feed line with flow direction matching the arrow on the body. Use thread sealant on the FNPT connections and ensure the backflow preventer is oriented correctly. Always follow local plumbing codes and the manufacturer's instructions for safe 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
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Watts Products

3G Electric supplies Watts combination fill valve 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
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
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
Double check backflow preventer with 1 1/4 in FNPT x FNPT connections and ball valve shut-off. Temperature range 33°F – 180°F, overall length 16.38 in. Used in water systems to prevent backflow where non-health-hazard cross-connections exist
Watts
Double check backflow preventer with 1 1/4 in FNPT x FNPT connections and ball valve shut-off. Temperature range 33°F – 180°F, overall length 16.38 in. Used in water systems to prevent backflow where non-health-hazard cross-connections exist

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