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Watts Boiler Feed Valve w/Backflow Preventer: BD911, FNPT x FNPT, 1/2 in Pipe Size - Combination Fill Valve Backflow Preventers
WattsCombination Fill Valve Backflow Preventers

Watts Boiler Feed Valve w/Backflow Preventer: BD911, FNPT x FNPT, 1/2 in Pipe Size

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
Boiler Feed Valve w/Backflow Preventer: BD911, FNPT x FNPT, 1/2 in Pipe Size
Category
Combination Fill Valve Backflow Preventers
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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
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
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 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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Cross-referenced by specification & description
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WATTS Backflow Preventer: 9D, 3/4 in Pipe Size, 18.7 gpm Flow Rate, 4.81 in Overall Lg, Brass (MPN 3/4 9DS-M2)
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