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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4.2 ★★★★★
Based on 21 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
Dallas, US
★★★★★ 4
Flimsy
Color: Beige, Size: 8 Panel
It’s thinner than what I thought and flimsy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
S
Verified Purchase
sarah
Massapequa, US
★★★★★ 5
Reliable product made with care
quality has been consistently excellent every single time. It’s reliable, tastes great, and you can tell it’s made with care. What really stands out is how it makes me feel afterward. Even after working a 12-hour overtime shift, I don’t feel as exhausted. It genuinely helps me keep my energy up. Highly recommend if you’re looking for something dependable and effective. I’ll definitely keep ordering.
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Reviewed in the United States on March 28, 2026
A
Verified Purchase
Amazon Customer
Lexington, US
★★★★★ 5
Look nice.
These were really nice for canned oysters, way better than what we can get in the stores in our area. Perfect for milk based oyster soup! the ratio is one can of cream of mushroom, one can full of milk, one can of oysters. Add butter, salt, pepper, and bring to a boil.
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Reviewed in the United States on November 10, 2025
G
Verified Purchase
Gary T
Lake Worth, US
★★★★★ 4
Does the job
Tastes like boiled oysters, so it has that nailed down. I use it in my shrimp ramen noodles sometimes, sometimes I use it to flavor garnish dishes. Best price I could find, but apparently it is a specialty product.
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Reviewed in the United States on September 16, 2020
D
Verified Purchase
D'King
Chelsea, US
★★★★★ 5
Unparalleled source of heme iron.
This stuff is medicine if your are anemic or have low serum iron. Elemental iron from veggies or pills must be prepared by your body to carry oxygen in hemoglobin. Not so with iron from animals and oysters are unparalleled in iron content. Even if you don't find them delicious you will find them efficacious.
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Reviewed in the United States on October 13, 2025

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