8
IOM-A-Deringer 20/20X/30/30X
2020-05
EDP2916001
© 2020 Watts
Installing Second Dual-action Check Module
1. Insert second check module (A) into access port (B) with second
check towers (C) pointing downstream. Push second check module
(A) downstream into valve sealing ring (D) until check O-ring (E) rests
against valve sealing ring (D). Push second check module (A) into its
fully seated position by hand.
2. Alternatively place 2"x4" piece of wood cut to 5" length (F) against
the backside of the second check seat ring (G). Using a 1"x4" piece
of wood cut to 16" length (H) as a lever between access port wall the
2"x4" (F) gently move the second check module (A) into its fully
seated position.
3. Be certain second check module (A) is fully seated and check O-ring
(E) is NOT “fish mouthed” or damaged.
4. Tighten the second check retaining screws (I)
ONLY AFTER
the
first
check module (A) has been installed.
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.
WARNING
!
FLOW
C
A
B
G
Not Binding
Binding
I
H
F
D
E
