Series LF7R
Dual Check Valves
LF7R Sizes:
1
⁄2" – 1" (15 – 25mm)
Series LF7R Dual Check Valves are designed for non-health
hazard residential water system containment and continu-
ous pressure applications, such as the drinking water supply
service entrance or individual outlets. Series LF7R uses two
compact replaceable check modules and is installed imme-
diately 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
requirements 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 iden-
tification tag indicating 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 appli-
cable, 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
For Light Commercial and Residential Applications
ES-LF7R
Job Name
–––––––––––––––––––––––––––––––––––––––––––
Contractor
––––––––––––––––––––––––––––––––––––––––––––
Job Location
–––––––––––––––––––––––––––––––––––––––––
Approval
–––––––––––––––––––––––––––––––––––––––––––––
Engineer
–––––––––––––––––––––––––––––––––––––––––––––
Contractor’s P.O. No.
––––––––––––––––––––––––––––––––––
Approval
–––––––––––––––––––––––––––––––––––––––––––––
Representative
––––––––––––––––––––––––––––––––––––––––
LF7R
1024
When ordering Series LF7R Valves with Meter Thread Con-
nections, be sure to order connection size one size
larger than meter thread. Examples:
Meter Size Order
5
⁄8" (16mm) x
1
⁄2" (15mm)
3
⁄4" (20mm)
5
⁄8" (16mm) x
3
⁄4" (20mm) 1" (25mm)
3
⁄4" (20mm) x
3
⁄4" (20mm) 1" (25mm)
LEAD FREE
*
Series LF7R: Inlet/Outlet Connections – Types available,
ordering code, sizes available.
CONNECTION CONNECTION SIZES AVAILABLE
TYPE CODE
in. mm
National Pipe Thread Female 2
1
⁄2 ,
3
⁄4, 1 15, 20, 25
National Pipe Thread Male 3
1
⁄2 ,
3
⁄4, 1 15, 20, 25
Female Meter Thread (Swivel) 10
3
⁄4, 1 20, 25
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.
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