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Watts 1/2 in Brass Double Check Backflow Preventer B911 (MPN 1/2 - Watts Double Check Backflow Preventers
WattsWatts Double Check Backflow Preventers

Watts 1/2 in Brass Double Check Backflow Preventer B911 (MPN 1/2

The Watts B911 Boiler Feed Valve with Backflow Preventer is a brass double check backflow preventer with a 1/2 in pipe size and 8.5 in overall length. This model (MPN 1/2 B911T-M3 (W/PRESS)) does not include a…

SKU 3G-OTH-434560

Also listed as: 12B911TM3WPRESS · 1 2 B911T M3 W PRESS · 1-2-B911T-M3-W-PRESS

Brand
Watts
Item
1/2 in Brass Double Check Backflow Preventer B911
Part Number
1/2 B911T-M3 (W/PRESS)
Category
Watts Double Check Backflow Preventers
Available to Order
Also known as:1/2 B911T-M3 (W/PRESS)Watts
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Technical Specifications

Watts
Manufacturer Part Number
1/2 B911T-M3 (W/PRESS)
Type
Brass, 911 (MPN 1/2 B911T-M3 (W/PRESS))
Overall Lg
8.5 in
Pipe Size
1/2 in
Shut-Off Valve Type
Shut-Off Valve Not Included

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

Product Description

The Watts B911 Boiler Feed Valve with Backflow Preventer is a brass double check backflow preventer with a 1/2 in pipe size and 8.5 in overall length. This model (MPN 1/2 B911T-M3 (W/PRESS)) does not include a shut-off valve. 3G Electric interprets customer demand and delivers this genuine industrial component across 14 departments, with specialist depth in combustion, pumps and controls as an authorised distributor.

Frequently Asked Questions

What is the Watts B911 boiler feed valve with backflow preventer used for?

The Watts B911 is a double check backflow preventer designed for boiler feed applications. It prevents contaminated water from flowing back into the potable water supply while allowing safe boiler filling. Common in commercial and industrial heating systems.

What are the specifications of the Watts B911 boiler feed valve?

The Watts B911 has a 1/2 inch pipe size, 8.5 inch overall length, and is made of brass. The manufacturer part number is 1/2 B911T-M3 (W/PRESS). It does not include a shut-off valve. This is a double check backflow preventer for boiler feed lines.

Where to buy the Watts B911 boiler feed valve worldwide?

3G Electric supplies the Watts B911 boiler feed valve worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to install the Watts B911 boiler feed valve?

Install the Watts B911 in the boiler feed line with flow direction matching the arrow on the body. Use pipe thread sealant on the 1/2 inch connections. Ensure the backflow preventer is accessible for testing. Follow local plumbing codes and manufacturer guidelines for proper 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 watts double 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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