1.28 GPF vs 1.6 GPF Toilets

1.28 GPF vs 1.6 GPF Toilets

As toilet technology has evolved through the years, toilet performance has obviously improved. One major improvement is water efficiency per flush. The amount of water needed to effectively flush has steadily decreased and now modern low flow toilets use very little water per flush compared to toilets of old. However, is there such thing as too little water? Is for example, a 1.28 GPF toilet better than a 1.6 GPF toilet? Hopefully, in this article 1.28 GPF vs 1.6 GPF toilets, we can compare these two low flow toilets to see which toilet is the best and if going very low is really necessary.

What is GPF and Why Does It Matter?

GPF, or gallons per flush refers to the amount of water used to flush a toilet. While many people may not think about this toilet feature, it is in fact a very important aspect. Older toilets generally have a higher GPF compared to modern toilets, making them more wasteful and not very environmentally friendly. Saving water is crucial, but what it also comes down to is money. If a toilet is using too many GPF, it is wasting a lot of money, quite literally flushing dollars down the drain.

Since 1992, the Energy Policy Act was implemented as a means of water conservation. It was regulated that toilets sold in the United States after January 1994 use no more than 1.6 gallons per flush. With that maximum in place, low flush toilets of 1.6 GPF became an industry standard. Throughout the years, the GPF a toilet needed has dropped from a startling 7 GPF to 3.5 GPF and then to 1.6 GPF. However, in recent years, there has been demand for an even lower GPF.  1.28 GPF low flush toilets have arrived and have become increasingly popular in households.

The cost savings associated with low flush toilets can be equated to just how much water they are known to save. Since implementing 1.6 GPF flow toilets, it is estimated savings of up to 20,000 gallons per year for a household family. The switch to high-efficiency toilets like these have reduced water use by a whopping 50%. These stats add up and with advancements of the 1.28 GPF toilets, the stats will continue to improve.

How Does GPF Influence a Toilets’ Overall Performance?

When judging a toilet’s performance, there are several criteria to consider. This includes how quiet the toilet is when flushing, how much it clogs (if at all), and the power of its flush. All these features are largely dependent upon if the toilet is gravity or pressure-assisted based. The gravity models rely on gravity to dispose of waste. They are generally designed with enhanced water velocity technology meant to siphon waste in a downward slope. The pressure-assisted base includes front jets to propel waste at a slightly faster rate. These toilets are considered a lot noisier than traditional gravity based toilets.

Newer advancements in toilet technology have set out to create a low flow toilet that uses less water per flush but still maintains an excellent performance. A common misconception is that low flow toilets are not as powerful as ones with bigger GPF. However, 1.28 / 1.6 GPF toilets have broken that mold by being more efficient with the water used. With low flow toilets, less is more. Manufacturers have designed newer models to accomplish more with less water during a single flush to ensure less need for double flushes, all while maintaining an overall excellent performance.

Initially, low flow toilets were considered to clog more than higher GPF toilets, however that has been addressed in recent years. As a low flow toilet should save money and be environmentally friendly, the designs today focus on ensuring no double flushes. A double flush means more water wasted and more money down the drain. In the past couple of decades, the toilet industry has really improved the performance of low flush toilets and changed people’s overall feelings towards them.

1.28 GPF Pros and Cons

  • Only 1.28 gallons used during a flush
  • Quieter than most other toilets
  • Eco-friendly design
  • Money saver
  • Space saving design with a smaller bowl
  • In the United States, all states allow this model
  • Uses an estimated 2,336 gallons a year per person (based off an average of 5 flushes a day)

  • Low powered flush
  • Additional flushes may be needed

1.6 GPF Pros and Cons

  • Only 1.6 gallons used during a flush
  • Typically, quiet
  • Single flush is enough
  • Powerful flush

  • Overall, not as efficient as a 1.28 GPF
  • Overall, not as Eco-friendly as a 1.28 GPF
  • Bulky in design with a larger tank shape
  • In the United States, not all states permit the use of this type of toilet
  • Uses an estimated 2,920 gallons a year per person (based off an average of 5 flushes a day)

What is a WaterSense Certified Toilet?

A WaterSense certified label ensures a high-quality toilet that has gone through vigorous testing to make sure it performs to a high standard and is also extremely water efficient. In fact, to receive a WaterSense Certified label, a toilet must use less than 1.6 GPF.  These toilets are independently tested and certified through the EPA (Environmental Protection Agency). They are generally found in residential homes, however, due to their better overall performance, they are becoming more popular among commercial use as well. 

What is the Best GPF for a Toilet?

1.28 GPF vs 1.6 GPF Toilet Comparison

When comparing 1.28 GPF and 1.6 GPF toilets, they are close in functionality, however, each one has its own pros and cons. Overall, 1.28 GPF toilets have become increasingly popular in recent years. As the world becomes more environmentally aware, society is striving to do what they can for the environment and their pockets.

Another question to ask is if a 1.6 GPF toilet is enough? Well, it most definitely can be for some families. While it’s popularity among households may be decreasing, some are sticking to this model. This could be due to a more powerful flush and because of this some people will assume it will have a better flushing performance. However, to have more power, it is using more water, so there is a tradeoff.

Can a 1.6 GPF Toilet be Bought in Texas or California?

As mentioned before, not all states allow the use of a 1.6 GPF toilet. For example, Texas and California are two states that prohibit the use of this model of toilet. But why? Toilet water has the highest percentage of indoor water usage in the nation, coming in at over 30%. For states like California and Texas, where droughts are a problem, high water wastage is a big concern. California implemented this rule first and not long after, Texas followed suit. It became a means of saving more water and in the long run helped the states become more environmentally focused.

So as you can see, there are pros and cons to both 1.28 GPF and 1.6 GPF toilets. They are both water efficient and widely available to choose from. Which one to choose? Well, this will depend on how water efficient you would like your toilet and whether you are willing to trade in a little power when comparing to a 1.6 GPF toilet. Of course, you may not have a choice depending on which state you live in. If you are purchasing a new toilet in either California, Texas, Georgia or New York, then the toilet flush cannot exceed 1.28 GPF.

However, if you do not live in one of these states and you want a little more water and power in your flush, then a 1.6 GPF toilet will be a better option for you.

Hopefully, you found this 1.28 GPF vs 1.6 GPF article useful. Have you a 1.28 GPF toilet in your home? Do you feel it is better than a 1.6 GPF toilet? If you have any experience to share, then leave a comment below.

      The Toilet Seat Guy

      https://www.thetoiletseatguy.com/ is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com
      © 2019 The Toilet Seat Guy - All Rights Reserved
      The Toilet Seat Guy
      Enable registration in settings - general