4
TROUBLESHOOTING
Several problems and solutions are presented
below to assist you in troubleshooting the valve
assembly in an efficient manner.
1. Leakage at Bottom Connection: Tighten
valve threaded connection. If leak
persists, remove valve and seal threads
with thread sealant or tape.
2. Leakage at Cover: Tighten bolts in a
crossover patter per Table 2, replace
gasket.
3. Valve Leaks when Closed: Backwash
valve to remove debris. Disassemble and
inspect seat and float for damage.
NOTE: Many floats contain sand for
weight, but if water is detected replace
float.
DISSASSEMBLY
The valve can be disassembled without
removing it from the pipeline. Or for
convenience, the valve can be removed from the
line. All work on the valve should be performed
by a skilled mechanic with proper tools. No
special tools are required.
1. Close inlet shutoff valve (A). Open drain
valve (B) or remove drain plug. Remove
the cover bolts (7) on the top cover.
2. Pry cover (2) loose and lift off valve
body. On models with 2” inlets, the float
assembly will be connected to the cover.
3. Remove the retainer screws (8) and
inspect the seat for cracks in the rubber
or wear in the sealing surface.
4. On 3” and larger valves, lift the float (5)
from body.
5. Turn guide bushing (9) to remove it from
the baffle (3) [or body (1) on 4” and
larger flanged valves].
6. Clean and inspect parts. Note: some
floats contain sand for extra weight; if
water is detected, replace float.
Replace worn parts as necessary.
REASSEMBLY
All parts must be cleaned and gasket surfaces
should be cleaned with a stiff wire brush in the
direction of the serrations or machine marks.
Worn parts, gaskets and seals should be
replaced during reassembly. Refer to Figures 2
and 3.
1. Apply Loctite 680 thread sealant to
guide bushing threads (9) and thread
bushing into baffle (3) [or body (1) on 4”
and larger flanged valves].
2. Lay seat (4) and baffle over inverted
cover and fasten with screws (8) with
maximum torque of 10 ft-lbs. DO NOT
OVER TORQUE. [4” and larger flanged
valves will not have a baffle.]
3. Assemble float (5) with Loctite 680 on
the threaded connections.
4. On 4” and larger valves, carefully lower
the float assembly into the body so that
the cushion (15) and washer (27) are
over the guide bushing (9).
5. Lay cover gasket (6) over body flange
and secure with lubricated bolts (7) to
the torque shown in Table 2.
6. Place valve back in service. Refer to
the Installation instructions on page 2.
Slowly open inlet isolation valve.
Size
Torque (ft-lbs)
1/4" 6
5/16” 18
3/8” 31
7/16” 50
1/2" 75
5/8” 150
3/4" 250
Table 2. Valve Cover Bolts Torques
WARNING: The valve must be drained
before removing the cover
or pressure may be
released causing injury.
(7 pages)
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