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how to maximize flow ro system

Best 3 Ways to Maximize Flow from Reverse Osmosis Drinking Water System

Do you want to improve the water flow from your Reverse Osmosis drinking water system? If your tank is working correctly but you want to get more water flowing faster from the faucet all the time, then stay tuned as Gary the Water guy shares 3 simple tips to help improve your water flow.

NOTE: if you find that the flow of your Reverse Osmosis drinking water system has deteriorated from when it was new and now you only get a glass or so from a full tank before it slows down, I suggest you watch this YouTube video of mine first to troubleshoot. 


The flow from a Reverse Osmosis system is determined by the tank. When the tank is full, the flow is the fastest. This is because there is an air bladder inside the tank that is compressed by the water in the tank. The more water = the more compression on the air bladder = faster flow.


There are a couple of things you can do to improve the flow of water in your Reverse Osmosis drinking water system.HuM-Water-Saver-75-Full

  1. Ideally, you would have a Reverse Osmosis system like this Water Saver 75 which has the larger 3/8 tubing from the tank through the last filter and all the way to the faucet. If you didn’t choose this unit, you can always improve the flow by changing the tubing size, fittings, and, in some cases, filters to improve the flow.
  2. You can move the tank closer to the faucet. When the tank is further it needs to push the water through more tubing with more resistance, which slows down the flow. Also, if the water needs to be pushed up, you get less flow. So move the tank as close to the faucet as possible, ideally under the sink.
  3. The biggest gain comes from installing another tank. Because the pressure from the tank is highest when the tank is full, when you use two tanks, you will get a higher amount of pressure for twice as long. Plus you have the added benefit of more water when you need it. If you are constantly running out of water, you can even upgrade to a 14 gallon tank.

Each of these three tips will give you better water flow! Combining more than one improvement, however, will give you even BETTER flow.


In my house, since I have my Water Saver 75 installed in the basement with its tank, I already have the larger 3/8” tubing. Additionally, I installed a second tank under the sink.

Click here to watch a demo video that shows the kind of flow I am getting with this setup so you can decide if it’s the right system for you, too!


You can find the supplies you need to make these improvements via the links below, plus benefit from FREE shipping and discount pricing from Water Estore!

  • Second tank –> SHOP NOW
  • Large 14 gallon tank –> SHOP NOW
  • Tank shut off for 3/8” tubing –> SHOP NOW
  • Tank shut off for ¼” tubing –> SHOP NOW
  • “T” to connect the second tank to water line 3/8” –> SHOP NOW
  • “T” to connect the second tank to water line ¼” –> SHOP NOW

For more information about these products, you can check out our websites at or in Canada or in the USA.

Looking for more? The Reverse Osmosis video playlist I was mentioning earlier can be viewed by clicking here