5
IOM-A-Deringer 40G/40GX/50G/50GX_6-8
2005
EDP#2916009
© 2020 Watts
Deringer 50G/50GX: Disassembly and
Maintenance of Bypass Check Valve
C
B
A
D
Part 1
1. Use an adjustable wrench to rotate check cover (A)
counterclockwise to remove.
2. Examine cover plate O-ring (B) for damage or fouling.
3. Remove spring (C).
4. Remove check poppet assembly (D) and examine for damage
or fouling.
5. Examine seat cage, located inside the check body, for damage or
fouling to the sealing seat. Do not remove unless the seat cage is
being replaced.
6. Reverse the order of above instructions to reassemble bypass
check valve.
A
Part 2
1. To replace a damaged red silicone poppet disk, use a #2 phillips
head screwdriver to remove the disk retaining screw (A).
2. Remove disk retaining washer (B).
3. Use a flathead screwdriver to remove the gasket from
poppet cavity (C).
4. Install new red silicone poppet disk (D).
5. Reverse the order of the above instructions to reassemble
check poppet assembly.
6. Reverse the order of the instructions on the previous page to
reassemble bypass check assembly.
A
A
C
B
D
Removing Bypass Meter
1. Using the ball valve handles close the #2 bypass ball valve
(B) and then #1 bypass ball valve (A). (Ball valve is closed
when “T” handle is perpendicular to water flow through
ball valve).
2. Using a #2 flathead screwdriver open bypass test cock #2
(D) and then open bypass test cock #1 (C). (Test cock is
open when screwdriver slot is parallel to water flow through
test cock).
3. Using a large adjustable pliers or wrench unscrew and
retract bypass meter coupling nuts (E). Remove the gaskets
(F) on both sides of bypass meter.
4. Gently remove bypass meter (G) from line. It is OK if the
bypass fittings move slightly during the removal process.
5. Reverse order of above instructions to reinstall bypass
meter. Remember install gaskets (F) before threading meter
coupling nuts into place.
B
C
E
E
G
F
E
FLOW
D
A
