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 TM 55-1905-223-24-11
a. Remove the gate valve (3, FIGURE 2-23):
(1) Disconnect the water supply line at the valve inlet (1, FIGURE 2-23).
(2) Remove the gate valve (3) from the pipe nipple.
b. Remove the dial indicating pressure gauge (5, FIGURE 2-23):
(1) Loosen the locknut at the base of the gauge.
(2) Remove the gauge by turning it counterclockwise.
c. Remove the backwash water solenoid valve (2, FIGURE 2-23):
(1) Disconnect the electrical cable from the solenoid valve (paragraph 2-18).
(2) Disconnect the solenoid valve from the piping elbow (1, FIGURE 2-23).
d. Remove the ball check valve (7, FIGURE 2-23):
(1) Disconnect the check valve at point (6) on each side of the check valve.
(2) The lower section of piping will be disconnected when the check valve is removed.
WARNING
CHEMICAL HAZARD. This piping contains bleach.
Avoid
contact with skin and splashing in eyes.
e. Remove the chlorination (bleach) solenoid valve (2, FIGURE 2-24) and the bleach metering needle
valve (6):
(1) Disconnect the electrical cable from the solenoid valve (paragraph 2-18).
(2) Place a tubing clamp on the incoming bleach tubing (7) to stop the flow of bleach from the storage
tank.
(3) Hold a small container under the connections to catch bleach runoff and disconnect the fittings (5) on
each side of the metering valve (6). Remove the end of the tubing (7) from the valve.
(4) Disconnect fittings (3, 10), on each side of the solenoid valve (2), and fitting (8). Remove the tubin
g
sections (4, 9).
(5) Remove the solenoid valve (2) from its mounting bracket (1).
(6) Remove the bleach metering needle valve (6, FIGURE 2-24) as follows:
2-89
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