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10
IOM-A-Deringer 20/30_2.5-4
2005
EDP#2916002
© 2020 Watts
Close Test Cocks and Double Check All Closing/Sealing Mechanisms
1. Using the Deringer test cock wrench or a small adjustable
wrench slightly close main test cocks number 2, 3 and 4
(A) to allow excess air to be released before closing the test
cocks completely.
2. Deringer 30: Using a #2 flathead screwdriver close bypass
test cock number 1 and 2 (B). (Test cock is closed when
screwdriver slot on stem is perpendicular to water flow
through test cock)
3. Use the “T” handles to open bypass ball valve number 1 (D)
and then open bypass ball valve number 2 (C). (Ball valve is
open when “T” handle is parallel to water flow through
ball valve)
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
A
A
B
B
E
F
G
D
Open
Open
Closed
Closed
C