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🚿 Elevate your boiler game with Watts’ all-in-one water control wizard!
The Watts Boiler Combination Fill Valve and Backflow Preventer B911T is a 1/2 inch threaded, bronze-bodied valve that integrates water feeding and backflow prevention. Pre-assembled for quick installation and designed for easy servicing, it delivers high capacity performance while meeting ASSE 1012 safety standards—perfect for professional-grade boiler maintenance.
| Brand | Watts |
| Exterior Finish | Bronze |
| Inlet Connection Size | 0.5 inches |
| Inlet Connection Type | threaded |
| Item Dimensions | 8.5 x 2 x 5.25 inches |
| Item dimensions L x W x H | 8.5 x 2 x 5.25 inches |
| Material | Bronze |
| Material Type | Bronze |
| Outlet Connection Size | 0.5 inches |
| Outlet Connection Type | Threaded |
| Specification Met | ASSE 1012 |
F**D
Works as should.
Works as should. Just beware. They come in 1/2 right up to 1 inch.
D**I
Plumbing Supplies
This dual service water pressure and back flow valve is exceptional. The installation is super easy, it took me less than 30 mins to add to my hot water boiler. Highly recommend it, and the cost is better than most plumbing suppply warehouses.
P**K
Great replacement piece.
Works as it should.
N**N
needed for boilers
Installed on boiler, worked perfectly. Fit was great. Heavy brass construction.
J**N
Worked perfectly. Saved me $500 from having to pay someone to install a similar setup
Well made, quality product. No issues whatsoever.
T**B
speedy delivery
Speedy delivery and good quality
K**T
It does it's job.
Unions on backflow preventer made it easy to install, working pressure was exactly as preset.
B**T
Durable Made Well
Product has quality and has been performing as is should now for a couple of months.
J**R
High quality Watts product.
Seems like a high quality part. I have it hooked up and it is working.
M**S
Excellent
working perfect
F**S
Great deal
Great price. Combo is much cheaper than buying separately. Great quality.
G**F
Stick with WATTS
Perfect fit. Replaced an existing WATTS that lasted 40 years and confident I'll get another 40 out of this one
R**Y
Good product
good as expected
Trustpilot
1 week ago
3 weeks ago