Troubleshooting and Maintaining the Sloan Naval
®
Flushometer
The Repair Kits and Parts listed are designed to service most variations of Sloan Piston
Type (Naval, Crown, Crown/Naval and Star) Exposed and Concealed Flushometers.
Each item has been identified by a Part Number and a corresponding Code Number. To
expedite your replacement requirements, order by Code Number.
NOTE:
In all Piston variations the SH-406 Spring has replaced the “U” Bar. In all Piston
variations the CN-68-A Single Lip Cup has replaced the S-14-A Double Lip Cup. When
rebuilding a Piston, install the CN-68-A Single Lip Cup with the cup facing down.
Consult your Sloan Representative or the factory for assistance in crossing over older
part and kit numbers to current Crown/Naval numbers.
1. PROBLEM:
Valve does not function.
CAUSE:
(a.) Control Stop or Main Valve Closed.
(b.) Handle Assembly is worn.
SOLUTION:
(a.) Open Control Stop or Main Valve.
(b.) Install Handle Repair Kit (B-51-A) or replace handle.
2. PROBLEM:
Insufficient volume of water to adequately siphon
fixture.
CAUSE:
(a.) Control Stop not open enough.
(b.) Urinal or Shower Piston installed in a Closet Valve or
older Blow Out Urinal.
(c.) Regulating Screw (on top of valve) not at proper setting.
(d.) Piston worn out.
(e.) Inadequate volume or pressure at supply.
SOLUTION:
(a.) Adjust Control Stop for desired delivery of water.
(b.) Replace Piston with proper Closet Piston
(CN-100-A).
(c.) Turn Regulating Screw counterclockwise to increase
flush.
Adjustment Range:
Urinal - 1/2 to 3 gallons per flush (1.9 to 11.4 Lpf)
Closet - 1-1/2 to 7 gallons per flush (5.7 to 26.5 Lpf)
(d.) Repair or replace Piston.
(e.) 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 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.
3. PROBLEM:
Length of flush too short (Short Flushing) or Valve
closes off immediately.
CAUSE:
(a.) Regulating Screw not at a proper setting.
(b.) Water passing by damaged or worn Piston Cup.
(c.) Loose Piston Assembly or loose Top Plate Screw.
(d.) Damaged or worn Piston Top Plate or Expelor.
(e.) Urinal or Shower Piston installed in a Closet Valve or
older Blow Out Urinal.
SOLUTION:
(a.) Turn Regulating Screw counterclockwise to lengthen
flush.
(b.) Repair or replace Piston.
(c.) Tighten Top Plate Screws. Screw Piston Body and
Guide together (hand tighten ONLY - rubber Relief Valve
Seat will distort if screwed too tight).
(d.) Repair or replace Piston.
(e.) Replace Piston with Closet Piston (CN-1002-A).
4. PROBLEM:
Length of flush too long (Long Flushing) or fails to
close off.
CAUSE:
(a.) Regulating Screw not at proper setting.
(b.) Relief Valve in Piston is not seating properly due to
wear or debris.
(c.) Bypass holes in Piston or Top Plate clogged or
fouled with debris.
(d.) Closet Piston installed in Urinal Valve.
(e.) Line water pressure has dropped and is not sufficient
to force Relief Valve to seat.
SOLUTION:
(a.) Turn Regulating Screw clockwise to shorten flush.
(b.) Disassemble Piston Assembly and wash under
running water. Repair or replace Piston if necessary.
(c.) Disassemble Piston Assembly and wash under
running water. Repair or replace Piston if necessary.
(d.) Replace Piston with Urinal Piston (CN-1003-A).
(e.) Shut off Control Stop until pressure has been
restored, then reopen Stop.
5. PROBLEM:
Water splashes from fixture.
CAUSE:
(a.) Supply volume is more than necessary.
(b.) Lime or mineral accumulation on fixture vortex
or spreader holes.
SOLUTION:
(a.) Adjust Control Stop to meet flow rate required for
proper cleansing of fixture.
(b.) Remove lime or mineral build-up in fixture.
6. PROBLEM:
Flush is not considered “Quiet” or makes noise at
close off.
CAUSE:
(a.) Control Stop not properly adjusted.
(b.) Worn, damaged or loose Main Seat.
(c.) Worn Piston.
SOLUTION:
(a.) Adjust Control Stop to meet flow rate required for
proper cleansing of the fixture.
(b.) Replace Main Seat.
(c.) Repair or replace Piston.
7. PROBLEM:
Leaking at Handle Assembly.
CAUSE:
(a.) The B-39 Handle Seal may be deteriorated.
(b.) Handle Gasket has been omitted.
(c.) Valve Handle Bushing is worn.
SOLUTION:
(a.) Install new B-39 Handle Seal.
NOTE:
The B-39 Seal will easily slide right onto
the Bushing if it is wet.
(b.) Install A-31 Handle Gasket or Handle Repair Kit (B-51-A).
(c.) Install Handle Repair Kit (B-51-A).
CARE AND CLEANING INSTRUCTIONS
DO NOT use abrasive or chemical cleaners to clean Flushometers that may
dull the luster and attack the chrome or special decorative finishes. Use
ONLY soap and water, then wipe dry with clean cloth or towel.
While cleaning the bathroom tile, protect the flushometer from any
splattering of cleaner. Acids and cleaning fluids can discolor or remove
chrome plating.
If further assistance is required, please contact the Sloan Valve Company
Installation Engineering Department at 1-888-SLOAN-14.
SLOAN VALVE COMPANY • 10500 SEYMOUR AVENUE • FRANKLIN PARK, IL 60131
Phone: 1-800-9-VALVE-9 or 1-847-671-4300 • Fax: 1-800-447-8329 or 1-847-671-4380 • http://www.sloanvalve.com
Copyright © 2003 Sloan Valve Company Printed in the U.S.A. Made in the U.S.A. NAVAL M.G. — Rev. 1b (05/03) Code No. 0816187
