Watts AMES Deringer 20 Installation, Operation And Maintenance Manual
Double check valve/double check detector assemblies
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Installation, Operation and
Maintenance Manual
Deringer
™
Double Check Valve/Double
Check Detector Assemblies
Size: 2½" – 4"
WA R NI N G
!
Read this manual BEFORE using this equipment.
Failure to read and follow all safety and use information can
result in death, serious personal injury, property damage, or
damage to the equipment.
Keep this manual for future reference.
WARNING
!
You are required to consult the local building and plumbing
codes prior to installation. If the information in this manual
is not consistent with local building or plumbing codes,
the local codes should be followed. Inquire with governing
authorities for additional local requirements.
20/30
IOM-A-Deringer 20/30_2.5-4
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Summary of Contents for Watts AMES Deringer 20
- Page 1 IOM-A-Deringer 20/30_2.5-4 Installation, Operation and Maintenance Manual Deringer 20/30 ™ Double Check Valve/Double Check Detector Assemblies Size: 2½" – 4" WA R NI N G Read this manual BEFORE using this equipment. Failure to read and follow all safety and use information can result in death, serious personal injury, property damage, or damage to the equipment.
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Page 2: Tools Required
#2 Flathead Screwdriver #2 Phillips Head Screwdriver " Ratchet Wrench Adjustable Wrench Deringer Test Cock Wrench Slip-Joint Pliers T45 Torx Wrench Wood Block 2" x 4" x 5" Wood Block 1" x 2" x 16" IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts... - Page 3 1. Main Test Cock Bypass Test Cock 6. Using the Deringer test cock wrench or a small adjustable wrench open main test cock number 2. Closed Open Closed Open IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...
- Page 4 (C), gently push the second check module in the upstream direction until the second check module can easily be removed from the access port by hand. FLOW IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...
- Page 5 2. Remove disk retaining washer (B). 6. Reverse the order of the instructions on the previous page to reassemble bypass check assembly. 3. Use a flathead screwdriver to remove the gasket from poppet cavity (C). IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...
- Page 6 3. Should elastomer disk (D) need replacement unscrew disk • Do not cross thread disk retaining screws (F). retainer screws (F) and remove disk retainer (G). Carefully remove and replace elastomer disk (D). When replacing IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...
- Page 7 Orient seat protrusions as shown the seat. In order to maintain the performance of the valve pay attention to the proper orientation of the check module. Tower Bosses Spring Arms IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...
- Page 8 The second check module must be fully seated to ensure retainer screws do not bind against check seat. Binding retainer screws against check seat will result in permanent damage to second check modules. Binding Not Binding FLOW IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...
- Page 9 O-ring (A) does not become dislodged during the process. 3. Insert cover bolts (D) into tapered cover holes (E). 4. Use ratchet wrench (F) to sequentially tighten all cover bolts (D) alternating from one side of the valve to the other. IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...
- Page 10 4. Double check to be certain of the following: • All cover bolts are tightened (E) • Deringer 30: Bypass check valve cover is tightened (F) • Deringer 30: Bypass meter coupling nuts are tightened (G) FLOW Open Closed Open Closed IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...
- Page 11 3. Slowly rotate the number 2 Shutoff valve operation Handle (B) counter clockwise to the open position. NOTICE Yellow/orange position indicator flags must be parallel to mainline water flow for backflow valve to be functional (C). FLOW IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...
- Page 12 USA: Backflow T: (978) 689-6066 • F: (978) 975-8350 • AmesFireWater.com USA: Control Valves T: (713) 943-0688 • F: (713) 944-9445 • AmesFireWater.com Canada: T: (888) 208-8927 • F: (888) 479-2887 • AmesFireWater.ca Latin America: T: (55) 4122-0138 • AmesFireWater.com IOM-A-Deringer 20/30_2.5-4 2005 EDP#2916002 © 2020 Watts...