Repair when Flushing

How to check your toilet’s flush volume

Knowing how much your toilet flushes and which valves to use with them can be a complicated business. This article will help determine what valves are best used with your toilets. The easiest way to determine a toilet gallon per flush volume and which valve to use is by looking at the date of the toilet and looking at your toilets flush valve system. Use this date method to find the parts recommended.

  • Pre – 1994
  • 1994 – Present
  • 2005 – Present (HET- High Efficiency Toilets)

Pre-1994 Toilets Water Saving and older toilets:

Toilets that date prior to 1994 fall in to two main flush volumes: 5-7 gallon per flush (gpf) and 3.5 gallons per flush (gpf). In these toilets, Fluidmaster recommends using our Standard or Leak Prevention Fill Valves (400A or 400LSR) and a 2 inch (Non-Adjustable) Flappers (models include 500, 501, 503, 504).

To see list of valves or kits that we recommend follow these links:

Fill Valves:

http://www.fluidmaster.com/toilet/part-type/fill-valves/

Flappers:

http://www.fluidmaster.com/toilet/part-type/flappers/

Repair Kits:

http://www.fluidmaster.com/toilet/part-type/repair-kits/

1994  to 2006 Toilets:

Toilets that are dated 1994 to present time fall into two main flush volumes, 1.6 and 1.28 gallons per flush.

In these toilets, Fluidmaster recommends using both our High Performance Fill Valves (model 400AH) and our PerforMax® and Water Savings (Adjustable) Flappers both in 2 and 3 inch (sizing) categories (models include 502, 5051 and 5403).

To see list of valves or kits that we recommend follow these links:

Fill Valves:

http://fluidmaster.wpengine.com/toilet/part-type/fill-valves/

Flappers:

http://fluidmaster.wpengine.com/toilet/part-type/flappers/

Repair Kits:

http://fluidmaster.wpengine.com/toilet/part-type/repair-kits/

2005 – Present (High Efficiency Toilets):

Toilets that are dated 2005 to present time fall into two main flush volumes, 1.28 and lower gallons per flush.

In these toilets,  Fluidmaster recommends using both our High Performance Fill Valves (model 400AH) –  PerforMax® and Water Savings (Adjustable) Flappers – both 2 and 3 inch (sizing) categories –  3 inch Flush Valve (model 540AKR).

HET is an abbreviation for High Efficiency Toilet. These toilets have flush volumes that are less than the standard 1.6 gallon per flush toilet. These toilets need a higher refill rate when refilling the toilet bowl and may come with a larger than standard 2 inch flush valve drain.

Flush valves can be designed as Dual Flush, Tower Flush, 2 inch and 3 inch Flush Valve Drains.

  • Dual Flush valves can alternate the flush volume from a full flush (standard flush volume of 1.6 or less) to a partial flush (less than standard full flush). Fluidmaster  has a Dual Flush which converts “any” standard flush to an alternating flush using our dual flush technology (models 550DFRK & 550DFR)
  • Tower flush valves are valves that normally are 1 piece in design and the entire flush valve drain lifts up to release the water.
  • 2 inch and 3 inch Flush Valves are valves that flush using a flapper valve to release the water. The designation 2 inch and 3 inch describe the drain opening along with the corresponding size of the flapper that covers the drain opening.

To see list of valves or kits that we recommend follow these links:

Fill Valves:

http://fluidmaster.wpengine.com/toilet/part-type/fill-valves/

Flappers:

http://fluidmaster.wpengine.com/toilet/part-type/flappers/

Repair Kits:

http://fluidmaster.wpengine.com/toilet/part-type/repair-kits/

Flush Valves:

http://fluidmaster.wpengine.com/toilet/part-type/flush-valves/

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