11
IOM-A-Deringer 20/20X/30/30X
2020-05
EDP2916001
© 2020 Watts
Open Shutoff Valves to Make Backflow Preventer Functional
1. Slowly rotate the number 1 shutoff valve operation handle
(A) counter clockwise to the open position. (Shutoff valve is
open when yellow/orange position indicator flags are parallel
to the mainline water flow).
2. Slowly rotate the number 2 shutoff valve operation handle
(B) counter clockwise to the open position.
FLOW
C
C
B
NOTICE
Yellow/Orange Position Indicator Flags must be parallel to mainline water flow
for Backflow Valve to be functional (C).
A