Specification Sheet

Series LF7
Dual Check Valves
LF7 Sizes: 1
1
⁄4"
LF7C Sizes:
3
⁄8"
Series LF7 Dual Check Valves are designed for non-health
hazard residential water system containment and continuous
pressure applications, such as the drinking water supply service
entrance or individual outlets. Series LF7 uses two compact
replaceable check modules and is installed immediately down-
stream of the residential water meter. The LF7 features Lead Free*
construction to comply with Lead Free* installation requirements.
Features
• Can be installed vertically or horizontally
• Available with combination of inlet/outlet sizes, types or thread
and end connection including retrofit compression fittings and
hose connections
• Can be installed in many piping configurations and with a wide
range of meter horns, copper setters and meter boxes
Specifications
The dual check backflow preventer shall meet the domestic
requirements of ANSI/ASSE Standard 1024, and bear the seal of
approval. It shall have a cast body and include not less than one
union, with the union nut drilled to accept a tamper-proofing lock
wire. A brass identification tag indicating direction of flow shall
be securely attached to the valve body by corrosion-resistant
mechanical fasteners. The Lead Free* Dual Check Valve shall
comply with state codes and standards, where applicable, requir-
ing reduced lead content. The dual check shall be Watts Series
LF7. (Please select the model best suited to your application.)
Pressure – Temperature
Temperature Range: 33˚F – 180˚F (0.5˚C – 82˚C) continuous
Maximum Working Pressure: 150psi (10.3 bar)
Approvals
For Light Commercial and Residential Applications
ES-LF7
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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LF7
*When ordering Series LF7 Valves with Meter Thread
Connections, be sure to order connection size one size
larger than meter thread. Example:
METER SIZE ORDER
1" 1
1
⁄4"
LEAD FREE
*
Series 7: Inlet/Outlet Connections – Types available, ordering
code, sizes available.
Standards
Complies with Buy America Act (BAA 1933) and The American
Recovery and Reinvestment Act (ARRA 2009).
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.
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
NOTICE
Inquire with governing authorities for local installation requirements
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 begin-
ning the installation of this product.
NOTICE
1024
B64.6
CONNECTION CONNECTION SIZES
TYPE CODE AVAILABLE
in.
National Pipe Thread Female 2
3
⁄8 , 1
1
⁄4
National Pipe Thread Male 3 1
1
⁄4
Meter Thread Female* 4 1
1
⁄4
Female Meter Thread (Swivel) 10 1
1
⁄4