CALEFFI 573 Series Quick Start Manual

FlowShield™ DuC-AV
Backflow preventer with intermediate atmospheric vent
© Copyright 2023 Caleffi
Technical specifications
Connections:
Materials: Body:
Filter:
Check valve:
Check valve stem:
Diaphragm:
Seals:
Maximum working pressure:
Maximum working temperature:
Emergency back pressure temperature:
Medium:
Certified to:
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
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.
1/2"- 3/4" NPT female with union
ASSE 1012-2021, by ICC-ES, file PMG-1359.
CSA B64.3-94, file 219199.
1
38517.10
www.caleffi.com
573 Series
C US
ASSE 1012
1/2" SWT with union
1/2" press with union
low lead brass
stainless steel
PSU
brass
peroxide-cured EPDM
peroxide-cured EPDM
175 psi (12 bar)
210°F (99°C)
250°F (121°C)
water