Submittal Sheet

For Residential and Commercial Applications
ES-BD911
Job Name
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Contractor
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Job Location
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Approval
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Engineer
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Contractor’s P.O. No.
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Approval
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Representative
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Series BD911
Combination Bronze Dial Set Fill
Valve and Backflow Preventer
Size:
1
⁄2" (15mm)
Series BD911 combination fill valve and backflow preventer
consists of a Model 9D backflow preventer and Model
BD1156F feed water pressure regulator in one pre-assembled
unit. This valve is a high capacity valve designed for use on boil-
er feed lines to provide make-up water to the boiler and prevent
backflow when supply pressure fails below system pressure
and incorporates a unique push-button fast fill engagement with
auto-stop that prevents over-pressurization.
Features
• Pre-assembled for ease of installation
• Push button fast fill with auto-stop to prevent system
over-pressurization
• Dial indicator eliminates need for pressure gauge
• Same lay length as Watts 911
• High capacity fill valve for quick system filling and purging
Models
BD911T – all bronze body construction union
1
⁄2" NPT inlet x
1
⁄2" NPT outlet
BD911S – all bronze body construction union
1
⁄2" union solder
inlet x
1
⁄2" NPT outlet
Specifications
A combination bronze dial set fill valve and backflow preventer
shall be installed on the boiler feed line to provide make-up
water to the boiler. The valve shall contain a Watts Regulator
Model 9D backflow preventer and Model BD1156 dial set feed
water pressure regulator. The combination fill valve and back-
flow preventer shall be a Watts Series BD911.
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
BD911
The information contained herein is not intended to replace the
full product installation and safety information available or the
experience of a trained product installer. You are required to
thoroughly read all installation instructions and product safety
information before beginning the installation of this product.
NOTICE