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How To Save Water In The Bathroom With Every Flush

how to save water in the bathroom

The average person uses the toilet about five times per day. The average modern toilet uses about 1.6 gallons per flush (GPF).

And if you have a toilet that was installed before 1994 it can use 3.5, 5, or even up to 7 gallons of water with every flush.

That’s a lot of water wasted on a daily basis.

But is there a way on how to save water in the bathroom every time you flush the toilet?


We are sure that conscientious homeowners like you are always looking for ways to save water at home especially in the bathroom.

The toilet alone is a water guzzler accounting for 26.7% of all indoor water use in the United States according to the Environmental Protection Agency.

How Much Water Do We Use?

  • Toilet (26.7%)
  • Clothes Washer (21.7%)
  • Shower (16.8%)
  • Faucet (15.7%)
  • Leaks (13.7)
  • Other (5.3%)

how much water do we use

How Does A Toilet Work?

Driving each flush is the same mysterious force that holds the universe together.

The energy source to make your toilet flush is gravity.

We are dependent on the gravity of that 1.6 gallons of water falling from the tank into the bowl and that’s the force that takes all the waste away.

Inside your toilet’s tank is a float that rises as your water rises. You’ll either have a float ball or a float cup but they have the same function.

If you have a newer toilet you will most likely have a float cup inside your tank.

When you flush your toilet it triggers water to leave the tank, the ball or cup will move down with the surface of the water inside the tank.

As your tank is being refilled it causes the ball or cup to move back up.

When the water inside your tank reaches a certain level, it then triggers the toilet fill valve to shut-off the flow of water.

A fairly basic concept, right?

How To Save Water In The Bathroom With Every Flush

So here’s how the theory goes.

If you place a weighted item inside of the tank it will shut-off the water fill valve prematurely.

What this means is that each time you flush less water will make its way into the bowl from the toilet tank and thereby saves you water and money with each flush.

You may have also heard of this toilet tank water displacement concept referred to as “drop a brick in the toilet” or a “toilet tank bank.”

Both of these items are inexpensive to buy, the rubber brick runs about $15 and the toilet tank bank is only about $3.00 each but you can make your own DIY toilet tank bank.

Here’s how you can do it.

Use up to a 2-liter plastic bottle (depending on the size of your tank) and fill it with sand and water.

Make sure that the bottle doesn’t obstruct the valve at the bottom of the tank or gets in the way of the float that measures the level of water. Also, make sure your top is screwed on tight.

You can also display the water in your tank by using a gallon jug of water. See video below.

This little water displacer will help you conserve water with each flush and works perfectly for the extra flushes when you have guests over to your house!

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