SKU: 82451649292

WATTS 1/2 Inch B911-M3 Threaded Combination Water Feeder

Sale price$450.00 Regular price$500.00
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Description

WATTS 1/2 Inch B911-M3 Threaded Combination Water FeederThe WATTS 1 2 inch B911 M3 is a threaded combination water feeder and backflow preventer designed for use in hydronic heating systems. It automatically maintains system pressure while preventing contaminated water from backflowing into the potable supply. Ideal for residential and light commercial use. Product Specifications: Connection Size: 1 2 inch NPT threaded Body Material: Bronze Inlet Pressure Range: 10 to 25 psi adjustable (factory set at 15

The WATTS 1/2 inch B911-M3 is a threaded combination water feeder and backflow preventer designed for use in hydronic heating systems. It automatically maintains system pressure while preventing contaminated water from backflowing into the potable supply. Ideal for residential and light commercial use.

Product Specifications:

  • Connection Size: 1/2 inch NPT threaded
  • Body Material: Bronze
  • Inlet Pressure Range: 10 to 25 psi adjustable (factory set at 15 psi)
  • Temperature Range: 33°F to 180°F
  • Maximum Working Pressure: 100 psi
  • Standards: ASSE 1081, CSA B64.3 certified
  • Application: Hydronic heating systems
  • Type: Combination water feeder and backflow preventer

Key Features:

Two-in-One Functionality: Combines a pressure-reducing valve and backflow preventer to simplify system installation and improve reliability.

Adjustable Pressure Setting: Factory preset at 15 psi but easily adjustable to match the pressure requirements of your specific heating system.

Durable Bronze Construction: Made from corrosion-resistant bronze for long-lasting use and high performance under continuous heating cycles.

Certified for Safety Compliance: Meets ASSE and CSA standards, ensuring safe operation and prevention of backflow contamination.

Threaded Connection Design: Features standard 1/2" NPT threads for straightforward installation into most existing hydronic heating systems.

How It Works:

The WATTS B911-M3 combines a water pressure regulator and backflow preventer in a single unit. Installed on the feed line to a hydronic heating system, it automatically feeds water into the system to maintain a preset pressure, typically 15 psi. If system pressure drops, the valve opens to allow water in. The integrated backflow preventer uses a check valve to block contaminated water from flowing back into the potable supply. Its compact, threaded design simplifies both retrofits and new installations, offering protection and convenience in one package.

FAQs:

Can I use the B911-M3 with steam systems?

No, it is designed specifically for hydronic (hot water) heating systems, not steam applications.

How do I adjust the pressure setting?

The pressure can be adjusted using the screw on top of the feeder; clockwise increases pressure, counterclockwise decreases it.

Is this device lead-free and safe for potable water use?

No, this model is not rated lead-free and is not intended for direct use in potable water systems.

What happens if the system loses pressure completely?

The feeder will automatically open to restore system pressure to the preset value, ensuring the system remains operational.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 82451649292

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Rocky Cronkhite
Birmingham, US
★★★★★ 5
Great product
Color: 3675 Silver Blue, Color: 3675 Silver Blue
This watch is beautiful. And feels great
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Reviewed in the United States on March 8, 2026
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JJ
Draper, US
★★★★★ 1
Junk!
Color: 3675 ALL Silver
Good luck getting the back plate back in once you change the battery! You get what you pay for so spend the extra money and buy a better watch not made in China.
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Reviewed in the United States on May 25, 2026
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John S. Willard, Jr.
Fort Morgan, US
★★★★★ 4
Really nice watch!
Color: 3675 ALL Black
Really nice and clean looking watch. Fairly easy to adjust the watch band, with a little patience. Item description stated battery operated, but I don’t think it is as there is no indication that it has a battery in it. Other than that, really decent watch! I would have given it a five star rating if it were battery powered.
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Reviewed in the United States on March 23, 2026
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Ralph
Fort Morgan, US
★★★★★ 5
Great price
Color: 3675 Silver Grey
The watch looks like it should cost more than the actual price. It catches people's eye and so far it keeps accurate time. Keep in mind I've only had the watch about two weeks. Of my 10 every day watches this one is the most attractive.
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Reviewed in the United States on December 5, 2025
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Barry Benge
West Palm Beach, US
★★★★★ 5
Nice
Color: 3675 Silver Grey
Nicer than I imagined
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Reviewed in the United States on December 14, 2025

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