6
IOM-A-Deringer 20G/20GX/30G/30GX_6-8
2005
EDP#2916000
© 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 coax 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 as 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
E
A
B
Not Binding
Binding
I
Installing First Dual-action Check Module
1. Insert first check module (A) into access port (B) with first
check towers (C) pointing downstream. Push first check
module (A) upstream into valve sealing ring (D) until check
O-ring (E) is resting against valve sealing ring (D). Without
using excessive force, push first check module (A) into its
fully seated position by hand.
2. Alternatively, using a piece of 1"x4" wood cut to 16" length
(F) as a lever between the second check seat (G) and the
first check towers (C), push the first check module (A) into
its fully seated position.
3. Be certain first check module (A) is fully seated and check
O-ring (E) is NOT “fish mouthed” or damaged.
4. Now fully tighten the first and second check retaining screws (I).
The first check module must be fully seated to ensure
retainer screws do not bind against check towers. Binding
retainer screws against check towers will result in permanent
damage to first check modules.
WARNING
!
FLOW
Not Binding
Binding
C
A
B
E
F
G
D
I
G
H
F
D
