Install Instructions

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

Function

The backflow preventer can be used in all 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 valve is ICC-ES certified to ASSE 1013, CSA B64.4 and NSF

372 low lead laws. It meets codes IPC, IRC and UPC for use in

accordance with the US and Canadian plumbing codes.

Product range

574 series testable, reduced pressure zone backflow preventer

574 Series

H0003953.01

www.caleffi.com

Technical specifications

Materials

Body: DZR low-lead brass, EN 1982 CB752S

Cover: DZR low-lead brass, EN 12165 CW724R

Check valves: PSU-POM

Springs: stainless steel

Diaphragms and seals: peroxide-cured EPDM

Isolation ball valves, inlet and outlet

Body material: C89833 bronze

Ball: 304 stainless steel

Handle and nut: steel

Seat ring and packing gland: PTFE

Gland nut: brass

Stem: low lead brass

Performance

Suitable Fluids: water

Max. working pressure: 150 psi (10 bar)

Max. working temperature: 150°F (65°C)

Pressure test ports: upstream, intermediate, downstream

Connections: ½” NPT female & press

¾” NPT female & press

Certifications

1. ICC-ES certified to ASSE 1013, CSA B64.4 and NSF 372.

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 in

Drinking Water Act,certified by ICC-ES, file PMG-1360.

ASSE 1013

574 series Testable reduced pressure zone backﬂow preventer

code 574004A...................................................size ½" NPT female

code 574064A............................................................size ½" press

code 574050A...................................................size ¾" NPT female

code 574056A............................................................size ¾" press

Summary of content (12 pages)

PAGE 1
H0003953.01 www.caleffi.com 574 series testable, reduced pressure zone backflow preventer 574 Series © Copyright 2018 Caleffi Function The backflow preventer can be used in all 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 valve is ICC-ES certified to ASSE 1013, CSA B64.4 and NSF 372 low lead laws.
PAGE 2
SAFETY INSTRUCTION / CONSIGNE DE SÉCURITÉ This safety alert symbol will be used in this manual to draw attention to safety related instructions. When used, the safety alert symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD. Ce symbole d'avertissement servira dans ce manuel à attirer l'attention sur la sécurité concernant instructions.
PAGE 3
CAUTION: In the case of highly aggressive water, arrangements must be made to treat the water before it enters the backflow preventer, in accordance with current legislation. Otherwise the valve may be damaged and will not operate correctly. ATTENTION: Dans le cas de l'eau fortement agressifs, des dispositions doivent être prises pour traiter l'eau avant qu'elle ne pénètre dans le disconnecteur, conformément à la législation actuelle.
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
Maintenance Since the backflow preventer valve is used to ensure the safety of domestic water supplies it must be inspected per local codes. The first sign that the equipment is not functioning properly, generally associated with the presence of sand or other impurities is indicated by a permanent leakage through the discharge.
PAGE 6
Hydraulic Characteristics (LPM) 20 | 25 40 | 60 | 80 | 120 | 100 | 140 | 140 20 (1/2 inch) 574004A 574064A 15 (3/4 inch) 574050A 574056A 100 10 70 5 35 0 0 5 10 15 20 25 FLOW RATE (GPM) Size Max. Cv ½" 3.4 ¾" 7.
PAGE 7
RAPID INSPECTION PROCEDURE N TIO A ER OP ED N TIO CT E ET TD S AU DE RE Upstream valve or discharge valve leaking Dismantle and inspect -Permanent leakage -No leakage Close upstream shut-off valve and open upstream pressure control cock -Discharge does not open. Leakage is minimal and lasts more than 1 minutes. -Discharge opens abruptly, emptying in less than 1 minute.
PAGE 8
Procedure for examining internal parts 1. Release the pressure by unscewing the pressure test. Remove the cover bolts. 2. Pull out the core assembly and contrast spring. 3. Remove the split rings holding the check valves in place with a pair of long-nose pliers.
PAGE 9
4. Remove the upstream and downstream check valves using a common pipe wrench or suitable size pliers. 5. After examination and after replacing any necessary components when reinstalling the check valves make sure the split rings are perfectly located in the seat.
PAGE 10
574004A 574064A (½”) 5 6 1 7 7 3 2 9 10 8 11 4 12 1 Discharge assembly Spare parts Terungslagklep bovenstrooms Auslaufvorrichtung Dispositif de décharge 574004A 1 Dispositivo di scarico Discharge device 2 Ritegno a monte Upstream check valve 3 Ritegno a valle Downstream check valve Hinterdruck-RV 2 Upstream check valve 3 Downstream check valve Vordruck-RV Ref # Dräneringsventil Clapet amont Backflow code # Uppströms backventil Terungslagklep benedenstrooms 574064A Clapet aval
PAGE 11
8 CALEFFI CALEFFI 7 CALEFFI 574050A 574056A (¾”) 1 9 9 3 2 11 4 12 10 13 5 14 1 Discharge assembly 2 Upstream check valve 3 Downstream check valve 4 Discharge valve seat 5 Air gap 6 Deflector 7 Pressure test port 8 Iinspection Cover 9 Split ring 10 Body 11 Gasket 12 Tailpiece 13 Union nut 14 Discharge pipe* Spare parts Ref # 574050A 574056A 1 59471 2 59469 3 59470 4 59472 5 39623 Backflow code # Spare part code # Inspection equipment Equipment for a
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Application diagram T T P T F 1 2 3 0 4 FI CALEF A 12 Caleffi North America, Inc. 3883 West Milwaukee Road Milwaukee, WI 53208 T: 414.238.2360 F: 414.238.