Product Overview

ManualsBrandsCaleffi ManualsBackflow Preventers1/2" Press 574 Brass RPZ Backflow Preventer (Lead Free)

CALEFFI

ISO 9001 No. 0003

ACCREDITED

ISO 9001 FM 21654

Technical specification

Materials RPZ Backflow preventer

- Body: DZR low-lead brass, EN 1982 CB752S

- Access cover: DZR low-lead brass, EN 12165 CW724R

- Access cover bolts: stainless steel

- Check valves: PSU-POM

- Springs: stainless steel

- Diaphragms and seals: peroxide-cured EPDM

Isolation ball valves, inlet and outlet

- Body: bronze

- Ball: 304 stainless steel

- Handle and nut: steel

- Seat ring and packing gland: PTFE

- Gland nut: brass

- Stem: low-lead brass

Performance

Suitable fluds: Water

Max working pressure: 150 psi (10 bar)

Max working temperature: 150°F (65°C)

Certifications

1. ASSE 1013/CSA B64.4, certified by ICC-ES, file

PMG-1433.

2. NSF/ANSI 372-2011, 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, certifed by ICC-ES, file PMG-1360.

Connections

-NPT female: 1/2", 3/4"

Reduced pressure zone

backflow preventer

574 series

Function

The backflow preventer can be used in all plumbing systems where there

is danger of the potable water supply system being contaminated. It

prevents an accidental reduction in the pressure in the distribution system

from causing backflow from contaminated water in user installations.

The 574 series RPZ backflow preventer is ICC-ES certified to ASSE 1013,

CSA B64.4 and NSF 372 low lead laws. It meets codes IPC, IRC, NPC

and UPC for use in accordance with the US and Canadian plumbing

codes.

Also available in combination with AutoFill™ pre-adjustable automatic

filling valves, 1/2" and 3/4" sizes.

Product Range

574 series Reduced pressure zone backflow preventer (ASSE 1013) with four pressure test ports and inlet/outlet isolation ball valves

.....................................................................................................................................................sizes 1/2” and 3/4" NPT female, press connections

01022/18 NA

Code A B C D E Wt (lb)

574004A 1/2" FNPT 3 1/4" 6 1/4" 40 mm 9 3/4" 5.0

574064A 1/2" press* 3 1/4" 6 1/4" 40 mm 12 3/8" 5.1

adjustment screw

Code A B C D E F Wt (lb)

574050A 3/4" FNPT 4" 10 1/2" 40-60 mm 13 1/4" 1 3/4" 9.5

574056A 3/4" press* 4" 10 1/2" 40-60 mm 16 1/2" 1 3/4" 9.6

ASSE 1013

* Laylength: 10 7/8" * Laylength: 14 1/2"

Dimensions

Summary of content (8 pages)

PAGE 1
Reduced pressure zone backflow preventer CALEFFI 574 series 01022/18 NA ACCREDITED ISO 9001 No. 0003 ISO 9001 FM 21654 Function The backflow preventer can be used in all plumbing systems where there is danger of the potable water supply system being contaminated. It prevents an accidental reduction in the pressure in the distribution system from causing backflow from contaminated water in user installations. The 574 series RPZ backflow preventer is ICC-ES certified to ASSE 1013, CSA B64.
PAGE 2
Backflow: Water flowing in the distribution piping of potable water mains systems can become polluted with undesirable and hazardous substances caused by contaminated fluid return coming back from systems directly connected to the mains supply. This condition termed “backflow” occurs when: a) the pressure in the mains supply is lower than the pressure in the downstream system (back syphon), such as residential domestic water, hydronic or irrigation systems.
PAGE 3
Construction details Discharge air gap assembly In compliance with ASSE 1013, proper location of the RPZ backflow preventer is to ensure that adequate drainage is provided to as not to cause damage to the surrounding area. The discharge is not to be piped directly to a drain without a proper air gap. The 574 series provides the PVC air gap discharge assembly for this purpose. Corrosion resistant materials of construction All components are resistent to corrosion from potable water.
PAGE 4
Installation The installation of backflow preventer should only be carried out by qualified personnel in accordance with applicable codes and regulations. The backflow preventer includes an upstream and downstream shut-off valve. Install the unit in an accessible area which is not susceptible to accidental flooding. The equipment is to be installed horizontally only. The air gap, complying with the ASSE 1013 standard, must be connected in accordance with local codes.
PAGE 5
74004A 574064A (½”) 5 6 1 7 7 3 2 9 10 8 11 4 12 574004A Auslaufvorrichtung Dispositif de décharge Terungslagklep bovenstrooms Ref # 2 check valve Upstream check valve Vordruck-RV aUpstream monte 2 Ritegno 1 3 check valve Downstream check valve Hinterdruck-RV aDownstream valle 3 Ritegno 2 4 Air gap 6 Inspection cover 7 Seal ring 8 Body 9 Gasket 10 Tail piece 11 Union nut 6 Coperchio d’ispezione Inspection cover 7 Anello di tenuta Seal ring 8 Corpo Body 9 Guarnizione Gasket 1
PAGE 6
574050A 574056A (¾”) 7 8 1 9 9 3 2 11 4 12 10 13 5 14 1 1 2 2 Spare parts Discharge assembly Discharge assembly Upstream check valve Upstream check valve Ref # 574050A RefBackflow # 574050A code # 574056A 1 59471 1 59471 Discharge valve seat 4 4 Discharge valve seat 2 59469 2 59469 Air gap 5 5 Air gap 3 59470 order 3Spare part 59470 4 59472 5 39623 3 3 Downstream check valve Downstream check valve 6 6 Deflector Deflector 7 7 Pressure test port Pressure test port
PAGE 7
NOTES
PAGE 8
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 by ICC-ES. PSU-POM check valves, stainless steel springs, stainless steel access cover bolts and peroxide-cured EPDM diaphragm and seals.