Specification

Series LF7R
Dual Check Valves
LF7R Sizes:
1
⁄2" – 1"
Series LF7R 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 LF7R uses two com-
pact replaceable check modules and is installed immediately
downstream of the residential water meter. The LF7R 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
Specifications
The dual check backflow preventer shall meet the domestic re-
quirements of ANSI/ASSE Standard 1024, and bear the seal of
approval. It shall be Lead Free* cast copper silicon alloy bodied
and include not less than one union. An identification tag indi-
cating direction of flow shall be securely attached to the valve
body. The Lead Free* Dual Check Valve shall comply with state
codes and standards, where applicable, requiring reduced lead
content. The dual check shall be Watts Series LF7R. (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: 175psi (12.07 bar)
Approvals
Engineering Specification
ES-LF7R
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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LF7R
1024
B64.6
When ordering Series LF7R Valves with Meter Thread
Connections, be sure to order connection size one size
larger than meter thread. Examples:
Meter Size Order
5
⁄8" x
1
⁄2"
3
⁄4"
5
⁄8" x
3
⁄4" 1"
3
⁄4" x
3
⁄4" 1"
LEAD FREE
*
Series LF7R: Inlet/Outlet Connections – Types available,
ordering code, sizes available.
CONNECTION TYPE CONNECTION CODE SIZES AVAILABLE
in.
National Pipe Thread Female 2
1
⁄2 ,
3
⁄4, 1
National Pipe Thread Female –
longer length
2L
1
⁄2 ,
3
⁄4, 1
National Pipe Thread Male 3
1
⁄2 ,
3
⁄4, 1
Female Meter Thread 4 1
Female Meter Thread (Swivel) 10
3
⁄4, 1
Male Meter Thread 5 1
Union (U) Connections available on all inlet/outlet types and sizes.
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.
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