Kitchen Toilets

Water Saving Toilets?

5-gallon flushing toilet

Toilets have come a long way in the past 30 years, and the picture above shows a basic toilet with a 5 gallon flushing tank in the 1980’s and before.  The toilet is the number one use of water in the home compared to all other water consuming products in the home. The toilet uses more water than the dishwasher, the clothes washer and the ice-maker in the freezer.

The toilet design has gone through many style re-designs over the past 30 years for style, design and functionality.  Many 1.6 gallon per flush toilets have proven to  flush better than many 5 gallon per flush toilets at the time.

This started back in the early 1990’s when the EPA mandated (in the Energy Act of 1992 – that became law in 1994) that manufactures needed to start producing toilets that flush on 1.6 gallons of water per flush (know as gpf).  This regulation reduced the amount of water a toilet could flush on by almost 3 gallons per flush, as the current toilet models at the time were flushing on 5-6 gallons per flush.

A brief timeline is the following – and this was regulated at the manufacture level:

  • Toilets produced prior to 1980 flushed on 5-6 gallons of water per flush.
  • Toilets produced from 1980 to 1993 flushed on 3.5 gallons of water per flush.
  • Toilets produced from 1994 to the present flush on 1.6 gallons of water per flush.
  • Some local plumbing codes require toilets flushing on 1.28 gallons of water per flush.
  • Finally some toilets, considered Dual-Flush toilets, have the option of flushing on 1.0 gallons per flush.

In some instances going from a 5 gallon per flush toilet in a home to a 3.5 gallon per flush in a home save as 11,100 gallons of water per year.  Furthermore going from 3.5 gallons per flush to 1.6 gallons per flush in a home saves as much as 14,100 gallons of water per year.  These numbers are based on 1 toilet per home flushing 5 times per day.  Most homes in the US are flushing toilets more than 5 times per day.  The water savings is immense.

Considerations of Water Saving Toilets:

  • Do water saving toilets really save water?
  • How much water do water saving toilets save?
  • Why do water saving toilets flush better?
  • Do Dual Flush toilets work?
  • What is WaterSense?
  • What are WaterSense toilets?
  • How has the EPA gotten involved in water saving toilets?
  • What model toilets are WaterSense?
  • What is a Concealed Trap on a toilet and does that save water?

More  questions on Water Saving Toilets, leave a comment below and we will get back to you.

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