Product Overview

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Caleffi North America, Inc.
3883 W. Milwaukee Road
Milwaukee, WI 53208
Tel: [phone] · Fax: [phone]
[e-mail] · www.caleffi.com
© Copyright 2018 Caleffi North America, Inc.
SPECIFICATION SUMMARIES
574 series
Testable reduced pressure zone backflow preventer. ASSE 1017/CSA B4.4 and NSF 372 certified by ICC-ES . Threaded NPT
female or press connections from 1/2” to 3/4”. DZR low-lead brass body (EN 1982 CB752S) and access cover (EN 12165
CW724R) (<0.25% lead content), meets requirements of IPC, IRC, UPC, NPC and ANSI/NSF 372-2011 certified b y ICC-ES .
PSU-POM check valves, stainless steel springs, stainless steel access cover bolts and peroxide-cured EPDM diaphragm and
seals. Maximum working pressure 150 psi (10 bar). Maximum working temperature 150°F (65°C). Provided with inlet and outlet
isolation ball valves, bronze body, 304 stainless steel ball, steel handle and nut, PTFE seat ring and packing gland, brass gland nut
and low-lead brass stem. Complete with upstream, intermediate and downstream pressure zone test ports and PVC discharge
air gap assembly with collar fitting to discharge pipe.