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

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

The WATTS BD911 is a combination fill valve and backflow preventer, designed as a boiler feed valve. This bronze unit features a 1/2-inch pipe size with Sweat x NPT connections (MPN 1/2 BD911S).

SKU 3G-OTH-438459

Brand
Watts
Item
Boiler Feed Valve w/Backflow Preventer: BD911, Sweat x NPT, 1/2 in Pipe Size
Category
Combination Fill Valve Backflow Preventers
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Technical Specifications

Watts
Manufacturer Part Number
1/2 BD911S
Type
Sweat x NPT, Bronze, Female
Pipe Size
1/2 in
Connection Type
Sweat x NPT
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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 as a boiler feed valve. This bronze unit features a 1/2-inch pipe size with Sweat x NPT connections (MPN 1/2 BD911S).

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 to automatically feed water into a boiler system while preventing backflow contamination. It is commonly installed on commercial and residential hydronic heating systems to maintain proper water level and protect the potable water supply.

What are the specifications of the WATTS BD911?

The WATTS BD911 (MPN 1/2 BD911S) is a bronze combination fill valve and backflow preventer with a 1/2-inch pipe size. It features Sweat x NPT connections, making it suitable for soldering on one side and threaded piping on the other. The valve is designed for boiler feed applications.

Where to buy the WATTS BD911 worldwide?

You can source the WATTS BD911 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply this valve to procurement teams and engineers internationally.

How to install the WATTS BD911 boiler feed valve?

Install the WATTS BD911 by first shutting off the boiler and draining the system. Solder the Sweat connection to the supply line, then thread the NPT side to the boiler piping. Ensure the valve is oriented correctly per the flow arrow. 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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