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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4.1 ★★★★★
Based on 28 reviews
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Lula
Birmingham, US
★★★★★ 5
GET IT FOR YOUR SONN!!! ❤️
Size: 7 Years, Color: Sky Blue, Size: 7 Years, Color: Sky Blue
this suit is EVERYTHING!!! I can't believe we got it for this low!!! My son usually wears an 8, he's 6yo. the size 6 was snug, size 7 was perfect size 8 was still nice but a lil big. get it! Here the vid of the blue size 7. we just tried it on so didn't put on all the other pieces. the pink size 6 and the pink size 8 and a pink 2t wait it won't let me post multiple videos. darn.
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Reviewed in the United States on April 18, 2025
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Verified Purchase
Amazon Customer
Los Angeles, US
★★★★★ 1
Sizing is way wayyy off.
Size: 5T, Color: Beige
I ordered three of these in different sizes for my 5yro&7yro -They’re average to their age sized kids. So ordered size 5 for my 7 yro (I read other reviews on it being big). Everything fit except the pants we’re closer to a size 8 (I ordered a size 5 remember) so disappointed. And a size 4 for my 5yro. The size 4 pants fit my 7yro! But not my 5yro at all. The rest of size 4 outfit was only a little big but not big enough to trade up to the other child. Unfortunately the gigantic pants are beyond the problem. They are definitely running 3 sizes too big. They’re not even something I could fix with my sewing machine. Company says they’ll work with you & send one item “free”but then say their shipping & handling fees are more expensive than the suit. Feels like it’s a ploy. update, the third suit arrived after a month of waiting and its a size 3-well its supposed to be a size 3. The pants are the size of an 8 year old. Im pissed. it's now past the return date, I have 3 suits for $45 each, and I had to rig the pants to fit my 4yro for my wedding. looked like crap obviously bc an 8yro's pants don't fit a 4 yro.. Don't bother buying from this company unless you're buying for an absurdly proportioned person.
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Reviewed in the United States on July 12, 2023
E
Verified Purchase
emily
Whiting, US
★★★★★ 5
Absolutely loved it
Size: 12 Years, Color: Black
My son looked awesome in this suit! True to size. Great value for the price.
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Reviewed in the United States on March 16, 2026
K
Verified Purchase
kim cover
San Leandro, US
★★★★★ 5
Great suit
Color: Light Grey (Stretch Fabric), Size: X-Small, Color: Light Grey (Stretch Fabric), Size: X-Small
My son wore on 2 different occasions. Very nice for the price. No one could believe what we paid for it.
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Reviewed in the United States on April 15, 2026
S
Verified Purchase
Stephanie
Fort Morgan, US
★★★★★ 5
Very high quality suit for the price! Might as well buy, then rent.
Color: Deep Grey (Stretch Fabric), Size: X-Small
I bought this for my son for his Prom, as he decided to go last minute. He weighs around 125 pounds and is about 5'11. The XS fit was pretty amazing. As the supplier says, follow the size chart on the second picture. There is also some stretch to the material and the pants have belt loops. The only thing we noticed that we didn't like is that the sleeves were a little large at the opening around the wrist. Since the cuff-links are sew on, there isn't really on easy way to adjust this. All in all, this was a great purchase and I would highly recommend YND suits.
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Reviewed in the United States on May 20, 2024

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