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Sloan GEM 2 Parts Breakdown and Troubleshooting Guide

Below is the parts breakdown for the Sloan GEM 2 Flushometer. Within the parts breakdown, you can click on the part number(s) you need to repair your GEM 2 Flushometer. (Please note: If an item listed does not have a link, we still carry it, but it is not currently on our website. If you wish to order this item, call us.) Scroll past the parts breakdown to see the troubleshooting Q&A, which focuses on the commonly occurring problems of the unit, and the solutions to fix them.

GEM 2 Parts Breakdown PDF

View Complete Flushometers:
• Sloan 110YB GEM 2 Closet Flushometer 3.5 GPF
• Sloan 111YB GEM 2 Closet Flushometer 1.6 GPF
• Sloan 180YB GEM 2 Urinal Flushometer 3.0 GPF
• Sloan 186YB GEM 2 Urinal Flushometer 1.5 GPF
• Sloan 180-1YB GEM 2 Urinal Flushometer 1-1/4" Vacuum Breaker 1.0 GPF
• Sloan 186-1.0YB GEM 2 Urinal Flushometer 3/4" Vacuum Breaker 1.0 GPF
• Sloan 186.05YB GEM 2 Urinal Flushometer 0.5 GPF

  • 1. #80827 - G105 - Chrome Plated Cover
  • 2. #80828 - G106 - Slip Disc
  • 3. #08675 - G1007A - Closet Piston Kit 3.5 GPF
              #08593 - G1016A - Closet Piston Kit 1.6 GPF
              #08741 - G1019A - Closet Piston Kit 2.4 GPF
              #08732 - G1009A - Urinal Piston Kit 1.5 GPF
              #08595 - G1017A - Urinal Piston Kit 1.0 GPF
              #08740 - G1018A - Urinal Piston Kit 0.5 GPF
              #80829 - G1003A - Closet Piston Kit for Old Style Adjustable GEM Flushometers
              #80830 - G1002A - Urinal Piston Kit for Old Style Adjustable GEM Flushometers
  • 4. #08016 - V500AA - 3/4" x 9" Vacuum Breaker
              #08015 - V500AA - 1-1/4" x 9" Vacuum Breaker
              #08014 - V500AA - 1-1/2" x 9" Vacuum Breaker
  • 5. #08012 - V551A - Vacuum Breaker Repair Kit
  • 6. #80831 - CR1008A - 3/4" Spud Coupling
              #80832 - CR1009A - 1-1/4" Spud Coupling
              #80833 - CR1010A - 1-1/2" Spud Coupling
  • 7. #08040 - H550 - Tailpiece Coupling Nut
  • 8. #08039 - H551A - Adjustable Tailpiece 2-1/16" (Standard Length)
  • 9. #08038 - H552 - Locking Ring
  • 10. #08037 - H553 - O-Ring
  • 11. #80837 - H700A - 3/4" Chrome Plated Screwdriver Bak-Check® Stop Assembly
                #80791 - H700A - 1" Chrome Plated Screwdriver Bak-Check® Stop Assembly
  • 12. #08033 - H543ASD - 3/4" Control Stop Repair Kit
                #08032 - H543ASD - 1" Control Stop Repair Kit
  • 13. #08536 - H622 - Chrome Plated Bonnet
  • 14. #08036 - H582 - Locking Vandal Resistant Stop Cap
  • 15. #08321 - H1009ABX - 3/4" Vandal Resistant Control Stop Cap Assembly
                #08322 - H1010ABX - 1" Vandal Resistant Control Stop Cap Assembly
  • 16. #08419 - H574 - Control Stop Cap with Bumper
  • 17. #81670 - H576 - Control Stop Cap with Extended Bumper
  • 18. #80729 - G143A - Handle Assembly
  • 19. #57677 - G50A - Handle Repair Kit
  • 20. #80034 - G35 - Handle Gasket
  • 21. #08009 - B39 - Handle Seal
  • 22. #80835 - G-145 - Handle Grip
  • 23. #80836 - G144 - Handle Socket
  • Complete Units: #08663, #08716, #08785, #08797, #08786, #08799, #08555

Troubleshooting Q&A

Below is a Troubleshooting Q&A Guide for GEM 2 Flushometer from Sloan. The guide highlights the most commonly occurring problems and how to go about fixing them. As always you can call us for assistance or if you need to replace a part and/or unit.

Important: The GEM Flushometer is engineered for quiet operation. Excessive water flow creates noise, while too little water flow may not satisfy the needs of the fixture. Proper adjustment is made when plumbing fixtures is cleansed after each flush without splashing water out from the lip AND a quiet flushing cycle is achieved. Never open Control Stop to where the flow from the valve exceeds the flow capability of the fixture. In the event of a valve failure, the fixture must be able to accommodate a continuous flow from the valve.

Attention Installers: With the exception of the control stop inlet, DO NOT USE pipe sealant or plumbing grease on any valve component or coupling! To protect the chrome or special finish of Sloan Flushometers, DO NOT USE toothed tools to install or service these valves. Use our A-50 Super Wrench or other smooth-jawed wrench to secure couplings. Regulations for low consumption fixtures (1.6 GPF closets and 1.0 GPF urinals) prohibit use of higher flush volumes.


Valve does not function

A) Control stop or main valve is closed.
B) Handle assembly is worn.
C) Relief valve is worn and sticking in UP position

A) Open control stop or main valve.
B) Install Sloan handle repair kit G-50-A or replace handle.
C) Replace piston.


Insufficient volume of water to adequately siphon fixture

A) Control stop not open enough
B) Urinal piston parts inside a closet valve
C) Low-Consumption valve installed on a non-low consumption fixture
D) Inadequate volume or pressure at supply

A) Adjust control stop for desired delivery of water
B) Replace piston parts with proper closet piston
C) Replace with proper piston kit
D) Increase water pressure or supply (flow) to valve.


Length of flush too short, or valve closes off immediately

A) Piston assembly us not hand-tight.
B) Enlarged bypass orifice from corrosion or damage.
C) Urinal piston in closet flushometer.
D) Low-consumption piston installed in non-low consumption fixture.
E) Handle assembly worn.

A) Screw the assembly hand-tight.
B) Instal new inside parts kit to correct problem and update flushometer.
C) Replace piston with proper closet piston.
D) Replace with proper piston kit.
E) Install Sloan handle repair kit G-50-A


Length of flush too long or fails to close off

A) Piston is not seating properly, bypass orifice is clogged because of foreign material, or bypass orifice is clogged by an invisible gelatinous film from "over-treated" water.
B) Line pressure has dropped and is not sufficient to force relief valve to seat.
C) A 3.5 GPF closet piston has been used in a 1 or 1.5 GPF urinal or on a 1.6 GPF toilet.
D) Main seat is fouled with debris or is worn.

A) Disassemble the working parts and wash thoroughly. Note: size of the orifice in the bypass is of utmost importance in the proper metering of water into the upper chamber of the valve. DO NOT enlarge or damage this orifice. Replace piston if cleaning does not correct problem.
B) Shut off all control stops until pressure has been restored, then open them again.
C) Replace with proper piston.
D) Clean or replace main seat.


Leaking at handle assembly

A) The B-39 seal may have deteriorated
B) Handle Gasket has been omitted
C) Valve handle bushing is worn

A) Install new B-39 seal. Note: The B-85 seal will easily slide onto the bushing if it is wet.
B) Install G-35 handle gasket or Sloan handle repair kit G-50-A
C) Install Sloan handle repair kit G-50-A, or replace handle

GEM 2 Troubleshooting Guide PDF

View the Sloan GEM 2 repair parts or our selection of Sloan flush valves.