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  1. KOHLER
  2. Toilets and Seats
  3. Troubleshooting

Toilet Flush Rate Identification

Tank Versus Bowl Flush Rates

  • The flow rate, or gallons per flush (GPF) for a Kohler or Sterling toilet is specified on the product carton as well as inside the tank.

Tank Flush Rate

  • To verify the actual toilet flush rate, remove the tank lid and check the GPF stamped on the inside wall of the tank.
  • The model number and UPC are also stamped inside the tank.

Bowl Flush Rate

  • A GPF that is marked on the toilet bowl may not be the actual flush rate for the toilet.
  • The bowl GPF indicates the maximum flush rate for the bowl only.
  • For example: a bowl that says "1.6 gallons / 6 liters per flush or less" may be combined with a tank that is rated 1.6 GPF (6 LPF) or a tank rated 1.28 GPF (4.8 LPF).

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