TROUBLESHOOTING GUIDE
I.
Valve does not function.
A. Control Stop or Main Valve is Closed. Open Control Stop or Main Valve.
B. Handle Assembly is worn. Install Handle Repair Kit (B-50-A) or replace
handle.
II.
Insufficient volume of water to adequately siphon fixture.
A. Control Stop not open enough. Adjust Control Stop for desired delivery
of water.
B. Urinal or Shower Piston installed in a Closet Valve or older Blow Out
Urinal. Replace Piston with proper Closet Piston (CN-1002-A).
C. Regulating Screw (on top of valve) improperly set. Turn Regulating
Screw counterclockwise to increase flush.
VALVE FLUSH VOLUME ADJUSTMENT RANGE —
Urinal:
0.5 to 3 gpf (1.9 to 11.4 Lpf)
Closet:
1.5 to 7 gpf (5.7 to 26.5 Lpf)
D. Piston worn out. Repair or replace Piston.
E. Inadequate volume or pressure at supply. If no gauges are available to
properly measure supply pressure or volume of water at the Valve, then
completely remove the entire Piston from the valve, reassemble cover
and open Control Stop to allow water to pass through the empty Valve.
If the supply is adequate to siphon the fixture, remove the Flow Ring
from the bottom of the Piston to provide additional flow. If the supply is
not adequate to siphon the fixture, steps should be taken to increase the
pressure and/or supply.
III. Length of flush too short (Short Flushing) or Valve closes off
immediately.
A. Regulating Screw not at a proper setting. Turn Regulating Screw
counterclockwise to lengthen flush.
B. Water passing by damaged or worn Piston Cup. Repair or replace
Piston.
C. Loose Piston Assembly or loose Top Plate Screw. Tighten Top Plate
Screws. Screw Piston Body and Guide together (hand tighten ONLY -
rubber Relief Valve Seat will distort if screwed too tight).
D. Damaged or worn Piston Top Plate or Expelor. Repair or replace Piston.
E. Urinal or Shower Piston installed in a Closet Valve or older Blow Out
Urinal. Replace Piston with Closet Piston (CN-1002-A).
IV. Length of flush too long (Long Flushing) or fails to close off.
A. Regulating Screw not at proper setting. Turn Regulating Screw
clockwise to shorten flush.
B. Relief Valve in Piston is not seating properly due to wear or debris.
Disassemble Piston Assembly and wash under running water. Repair
or replace Piston if necessary.
C. Bypass holes in Piston or Top Plate clogged or fouled with debris.
Disassemble Piston Assembly and wash under running water. Repair
or replace Piston if necessary.
D. Closet Piston installed in Urinal Valve. Replace Piston with Urinal Piston
(CN-1003-A).
E. Line has dropped and is not sufficient to force Relief Valve to Seat. Shut
off Control Stop until pressure has been restored, then reopen Stop.
V.
Water splashes from fixture.
A. Supply volume is more than necessary. Adjust Control Stop to meet flow
rate required for proper cleansing of the fixture.
B. Lime or mineral accumulation on fixture vortex or spreader holes.
Remove lime or mineral build-up in fixture.
VI. Flush is not considered “Quiet” or makes noise at close off.
A. Control Stop not properly adjusted. Adjust Control Stop to meet flow rate
required for proper cleansing of the fixture.
B. Worn, damaged or loose Main Seat. Replace Main Seat.
C. Worn Piston. Repair or replace Piston.
VII. Leaking at Handle Assembly.
A. The B-39 Handle Seal may be deteriorated. Install new B-39 Handle
Seal. NOTE: The B-39 Seal will easily slide onto the Bushing if it is wet.
B. Handle Gasket has been omitted. Install A-31 Handle Gasket or Handle
Repair Kit (B-50-A).
C. Valve Handle Bushing is worn. Install Handle Repair Kit (B-50-A).
Refer to the Naval Flushometer Maintenance Guide for additional
Troubleshooting and Repair Part information.
If further assistance is required, please contact the Sloan Valve Company
Installation Engineering Department at 847/671-4300.
