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bracket (3). The float and linkage will be free
from the cover.
Remove the hex nut (8) and lock washer (9) and
unscrew the orifice button (7) from the lever arm
(11).
Remove the bracket screw (5) to remove the
leverage bracket (3).
remove the orifice (4) from the cover.
Remove the spring pins (13) connecting the
valve links (14) to the float arm (12). Remove
the spring pins (13) from the universal coupling
(15). Loosen the hex nut (8a) and lock washer
(25) and unscrew the float rod (20) from the float
ball (21). It may be necessary to apply some
heat as the float rod connection is secured with
Loctite.
Once they are connected, it's not practical to
separate the two floats.
Remover the float hood bolt (23), lock washer
(25) and float hood (22) from the lower float.
Inspect all parts for wear and damage. Minor
scratches and dents in the float are normal.
Some floats may contain sand for added weight
but if water is detected replace the float.
Carefully clean the orifice of scale. Replace
damaged parts.
REASSEMBLY
Clean all parts especially seating and sealing
surfaces before reassembling valve. Worn parts
should be replaced during re-assembly.
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Apply Loctite
PST thread sealant to orifice (4)
and thread into cover.
(maximum).
Install bracket (3), bracket screws (5) and lock
washer (6).
Thread orifice button (7) all the way into lever
arm (11) and install hex nut (8) and lockwasher
(9) but do not tighten. Connect the lever arm
(11) and float arm (12) to the bracket (3) using
two spring pins (13).
Adjust the orifice button (7) so that the end of
the lever arm (11) nearest the orifice button is
about 1/16" (1.6mm) farther from the cover than
the opposite end when the orifice button (7) is
Using a hex socket
Torque to 22 ft-lbs
gently resting on the orifice (4).
tightening hex nut (8).
Install valve links (14) and spring pins (13) to
connect the float arm (12) to the lever arm (11).
Apply Loctite 263 to one end of the connector
(24) and install in one of the floats. Apply Loctite
263 to the exposed end of the connector and
screw on the second float (21) and tighten.
Apply Loctite 263 to threads on float rod (20).
Install lock washer (25) and thread float rod into
float ball and tighten. Apply Loctite 380 to float
hood bolt (22) threads, install lock washer (25)
and float hood (22) onto lower float.
Connect float rod (20) to float arm (2) by
installing spring pins (13) in universal coupling
(15).
Verify free movement of linkage mechanism and
that the orifice button (7) presses against the
orifice (4) when the float rises and pulls away
when allowed to fall.
Lubricate and place O-ring (10) in cover (2) and
carefully place cover (2) on body (1) ensuring o-
ring is retained. Install the cover bolts (16) and
tighten in an alternating pattern.
Carefully introduce pressure and check for
leaks.
BACKFLUSHING INSTRUCTIONS
Follow all local cross-connection and safety
codes and regulations!
To determine if a GA Industries sewage air valve
needs cleaning or backflushing:
• Close the inlet isolating valve then slowly
open the ½" flushing ball valve (if installed)
or slowly remove the pipe plug at the top
of air valve to relieve internal pressure.
• Open the 1" blow off ball valve (if installed)
or remove the pipe plug near the bottom.
Liquid should freely drain from the valve
body. If it does not, then the valve is likely
in need of cleaning or backflushing.
To clean a GA Industries sewage air release
valve equipped with backflushing attachments:
4
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