Function
This dual check backflow preventer with intermediate atmospheric
vent is designed to protect drinking water systems from the return,
caused by backsiphonage or backpressure, of contaminated fluids.
The Caleffi 573 series FlowShield™ DuC-AV is certified by ICC-ES
to be in compliance with the International Plumbing Code (IPC),
International Residential Code (IRC), Uniform Plumbing Code (UPC),
and standards ASSE 1012-2021, and CSA B64.3-94. Additionally,
it is also complies with NSF/ANSI/CAN 372, low lead, as certified
by ICC-ES, Drinking Water System Components – Lead Content
Reduction of Lead in Drinking Water Act, California Health and Safety
Code 116875 S.3874, Reduction of Lead in Drinking Water Act.
Product range
573 Series FlowShield DuC-AV
dual check backflow preventer with atmospheric vent
size 1/2”- 3/4” NPT female threaded connection with union
size
1/2” sweat connection with union
size
1/2" press connection with union
Technical specifications
Connections:
1/2”- 3/4” NPT female with union
1/2” SWT with union
1/2" press with union
Materials: Body:
low lead brass
Filter:
stainless steel
Check valve:
PSU
Check valve stem:
brass
Diaphragm:
peroxide-cured EPDM
Seals:
peroxide-cured EPDM
Maximum working pressure:
175 psi (12 bar)
Maximum working temperature:
210°F (99°C)
Emergency back pressure temperature:
250°F (121°C)
Medium:
water
Certified to: ASSE 1012-2021, by ICC-ES, file PMG-1359.
CSA B64.3-94, file 219199.
NSF/ANSI/CAN 372-2011, Drinking Water System Components-Lead Content
Reduction of Lead in Drinking Water Act, California Health and Safety Code 116875
S.3874, Reduction in Drinking Water Act, as certified by ICC-ES, file PMG-1360.
1
ASSE 1012
US
C
38517.10
© Copyright 2023 Caleffi
www.caleffi.com
FlowShield
™
DuC-AV
Backflow preventer with intermediate atmospheric vent
573 Series
