Difference between 1.28 GPF vs. 1.6 GPF

1.28 GPF vs. 1.6 GPF: Which One You Should Buy

Whenever you decide to buy a new toilet or replace an old one, you consider many things before making the final decision. For example style, design, height of the toilet and its flushing capacity or flushing power. Flushing power of a toilet is a very important factor. A toilet should have the capacity to flush away all the waste properly. Otherwise it would be useless.

Any people are not patient enough to flush the waste twice or thrice. They find it to be a great drawback of a toilet if it does not flush away the waste with a single flush. Therefore, to overcome this problem toilet comes with different flushing capacities. Some of the most used ones are 1.28 gpf toilet and 1.6 gpf toilet. GPF stands for gallons per flush. Flushing capacity is not related to flushing power only. There are many other factors involved which will be discussed in detail in this article.

1.28 GPF Toilet:

This type of toilet is very efficient and useful. It consumes 1.28 gallons of water for each flush. Everyone knows that world water is becoming scarce with every passing day. As the water consumption of this toilet is very less, it is considered as an environment friendly version.

It is more suitable for a house with more number of toilets. A 1.28 gpf toilet can easily flush away all the waste even with a single flush because it is efficient and effective. It is therefore considered as an inexpensive option that will also help to save water. Using 1.28gpf toilets will help to save 3000 to 4000 gallons of water per year. This not only helps to save the environment by saving water but it also helps to save you money at the same time.

1.6 GPF Toilets:

The 1.6 gpf toilets consume more water as compared to 1.28 gpf but it does not mean that its efficiency is less. It has a strong flushing power. It cleans the heavy waste with one single flush. It also cleans all spots or stains as well. It also helps to maintain the pipes and drains and avoid clogging. It is a single flush toilet. It is opposite to dual flush toilets as it disposes then waste completely in a single flush.

A 1.6 gpf toilet uses more water than a 1.28 gpf toilet but is more efficient in working as compared to a 1.28 gpf toilet. Double flush is not needed as it flushes away all the waste with a single flush; therefore it saves water as well. The water saved is not as much as a 1.28 gpf, it is therefore, not considered as environment friendly as a 1.28 gpf toilet.

1.28 GPF vs. 1.6 GPF – Pros, Cons, & Comparisons

1.28 gpf and 1.6 gpf toilets are now recommended and used by many households. These models have got many advantages but they got many drawbacks as well. It is now up to you that how you decide and make the buying decision. In the following section, you will get to know the basic differences between the 1.28 gpf and 1.6 gpf toilets. This will let you make the decision in a better way.

Flushing Power:

The 1.28 gpf toilets are believed to have less flushing power as compared to 1.6 gpf. The water consumed is more in case of a 1.6gpf toilet but the efficiency is also believed to be far better than a 1.28 gpf toilet. We can analyze that by comparing two toilets from best brands.

One is 1.28 gpf toilet is from Toto Ultramax. The other toilet having 1.6 gpf is from American Standard. Both of these toilets are from a high end company. Both these models save money and consume less water. They are recommended by most consumers and they are said to be one of the best toilets in the market.

The 1.28 gpf toilet from Toto is considered more efficient and cleaner as it flushes away the waste without leaving any stains behind. Although its flushing capacity is less as compared to the 1.6 gpf toilet from American Standard but it is considered to have more flushing power.

It is therefore evident that flushing power is not related to water consumption. It is dependent on how better a company designs a toilet and how much they focus on quality while designing the toilet.

Water Consumption:

According to a survey, toilets use most of the water in a household. Approximately 30% of the household’s water is consumed by toilets. The world is already facing water scarcity and it is increasing with every passing day.

Therefore, people consider it very important to first analyze how much water will be consumed by the toilet which they are going to choose for the house. In most regions of the world, states have even passed different laws according to which more water consuming toilets does not pass the state laws.

A 1.2gpf toilet consumes less water as compared to a 1.6 gpf toilet. That is why it is more recommended by consumers. With every use of 1.28 gpf toilet you save 0.32 gallons and as a result save nearly $20 each time you use a toilet.


The cost of a toilet is not dependent on the water consumption of a toilet. The less water consumption does not mean that the cost will be more. There are 1.6 gpf toilets that are more expensive than 1.28 gpf toilets. the installation cost of both 1.28 gpf and 1.6 gpf is nearly the same.

There is however some regions in which people are offered special discounts to buy 1.28gpf toilets so that people buy more of these toilets and resultantly more water can be saved. The other benefit is that by installing a 1.28 gpf toilet you will also be able to save money in your monthly water bills. Less water consumption is obviously mean less water bills. The 1.28 gpf will save you 20% in the bills as compared to 1.6 gpf toilets.

Eco friendliness:

Toilets already are a great source of water consumption in a household. 30% of the total water of a household is consumed by toilets. Therefore, it is important to install toilets that are more efficient and save more water.

1.28 gpf toilets are designed to consume less water as compared to 1.6 gpf toilets. In many regions in the world, states have even passed rules to install toilets that consume less water. More water consuming toilets does not pass the state rules and thus you cannot install them without special permits.

This is obvious that 1.28 gpf toilets are more eco friendly as compared to 1.6 gpf toilets. Therefore, people who are in the favor of eco friendly products and the concept of eco friendliness prefer 1.28 gpf toilets over 1.6 gpf toilets.

Noise Level:

1.6 gpf toilets are said to be more efficient and flush with more power. Therefore, they are said to be a bit noisier as compared to 1.28 gpf toilets.

1.28 gpf toilets use gravity flush technology, the water flow is also slower as compared to 1.6 gpf toilets. That is why they are less noisy as compared to 1.6 gpf toilets.

Concluding Thoughts:

 The above content has given enough information regarding 1.28 gpf and 1.6 gpf toilets. you can now easily make a comparison between the two and decide which will suit best to your needs.

david osei

Hi, my name's david osei or just call me the Toilet Guy! At the ways101.com, Me and my teammates have made it a goal to find the best toilet products online. We're passionate about beautiful bathrooms, so we've decided to find, review, and compare the best toilets and toilet seats available online.