How to Increase Water Pressure in a Reverse Osmosis System

Reverse Osmosis systems are one of the most commonly used water filtration systems in homes and businesses. They’re also one of the most water-efficient systems you can use. However, they can be a little tricky to use. In this blog post, we’ll teach you how to increase water pressure in a Reverse Osmosis system.


What Is Reverse Osmosis Pressure?

A reverse osmosis system separates the water from impurities by passing it through a semi-permeable membrane. This process of purification is done by applying pressure to the water. The more pressure applied, the faster water will be purified.

When you have low water pressure, your home or business may suffer from below-par H2O quality and production levels—even if you have a top-of-the-line reverse osmosis unit. In turn, this can result in many negative side effects, such as:

  • Increased chemical use
  • Increased energy costs
  • Decreased food production

To avoid these side effects, it’s important to increase your water pressure in a reverse osmosis system. So how do you do that? Read on to find out!

How Do You Fix Low Pressure in Reverse Osmosis?

One of the most common problems with reverse osmosis systems is low pressure. This is especially common with homes that have a tankless water heater.

If you have a tankless water heater, one way to fix this problem is by installing a pressure-relief valve at the tankless water heater. This will help increase the pressure of the reverse osmosis system for homes that have these types of water heating systems.

If you don’t have a tankless water heater, there are a few other things you can do to increase your home’s reverse osmosis system’s pressure:

  • Install a booster pump.
  • Increase the size of your pipes from 3/4 inch to 1 inch by increasing pipe diameter or adding an additional pipe.
  • Use larger filters as they will allow more volume through and may help if the problem is with filtering speed (rather than pressure).

How Do You Increase Water Pressure in a Reverse Osmosis System?

First, you’ll need to know what the pressure of your water is. This can be done with a simple test kit. If it’s too low, there are several things you can do to increase the water pressure in your reverse osmosis system.

The first step is to replace your filter. A new filter will help with the low water pressure by removing any sediment in the water. It may also slow down the rate of leakage from your pipes and give you more time before replacing parts in your system again.

The second step is to check for clogs or leaks in any of your pipes or fittings. You don’t want to simply keep adding filters when there’s something else wrong! A professional plumber should be able to find this problem quickly and will provide additional advice on how to fix it if needed.

Finally, if all these steps fail, you’ll need to replace your pump (the part that moves the water through the reverse osmosis system). Keep reading below for information about how most people measure water pressure in a reverse osmosis system and how they know when it’s time for a new one.

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What Causes Low Water Pressure in Reverse Osmosis System?

A reverse osmosis system uses a membrane or filter to remove contaminants from water. The process of pressurizing the membrane is called backwashing.

Low water pressure in a reverse osmosis system can be caused by various factors, including these:

  • Dirt and sediment on the membrane
  • Excessive flow rate
  • Sediment buildup in the tank
  • A dirty or plugged RO filter

To increase water pressure in your reverse osmosis system, you’ll want to make sure any of these are addressed.

What Pressure Should My Reverse Osmosis Tank Be?

Your Reverse Osmosis tank should have pressure of 7 to 8 psi without any water in the tank. In order to efficiently operate an RO system, the water pressure should be between 40 and 80 psi.

The pressure of the water coming out of your reverse osmosis system depends on the size of the storage tank. The larger your tank is, the more water you can store and the higher your water pressure will be.

If you want to increase your water pressure and can’t upgrade your storage tank, there are a few things you can do.

One option is to replace your filter with a more efficient one. You may also want to check and see if they’re any clogs in the plumbing. If it’s not either of those, you might need to add more water than usual when filling up your tank.

If these steps don’t work, contact a plumber or other qualified professional for help.

How Much Is the Minimum Pressure Is Needed to Cause Reverse Osmosis?

A minimum of 40 psi is required for an RO system to operate effectively.

Most RO systems need a water pressure of 60 psi to operate at the optimal level. However, most systems can operate with water pressures between 40 and 80 psi.

Do I Need a Booster Pump for My RO System?

If you have a reverse osmosis system, chances are you’ve had low water pressure at some point or another. This can be due to a variety of issues, including clogged filters or pipes. However, the most common issue is that the pressure valve is set too high on your system.

A common reason why you might have this issue is if your system was installed by plumbers who were not familiar with RO systems. In these situations, it’s often best to have an HVAC professional help adjust the pressure valve settings.

Another way to improve water pressure in your RO system is by using a booster pump. A booster pump will boost the water pressure in your home and increase efficiency in your RO system by increasing water flow through the filters. These pumps come in different sizes that will fit various home setups and budgets

Why Is My RO Tank Not Filling With Water?

A common complaint with reverse osmosis systems is that they don’t produce enough water pressure. This can be caused by a few different things, but the most common cause is air in the system.

Water enters the filter through pipes and traps air along with it. This air needs to be released periodically or else it’ll build up in the tank. To release air from the filter, turn off your water supply for 10 to 15 minutes. Then fill pots of water until you notice it running out of the tap again.

If this doesn’t work, flush out your ro filter more often by leaving it open for about 5 minutes every day (or as needed). Most ro filters need to be flushed occasionally, so make sure you’re following manufacturer instructions for your specific filter model. A ro system that’s not functioning properly will not remove impurities from your water and could lead to health problems like kidney stones and various stomach issues.

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Tips for Using a Reverse Osmosis System

A reverse osmosis system can be a bit tricky to get used to. They’re designed to filter the water, so they remove minerals and other materials. This means you need to add water periodically, but it also means that the pressure will be lower than usual.

It’s important that you know how your machine works before you start using it. Get familiar with setting up your RO system, read what you can about how to maintain it, and make sure you know how long the filters will last before needing replacement.

Here are some tips for using a reverse osmosis system:

  • You should adhere to the manufacturer’s instructions for installing and maintaining your RO system; this may mean checking in with them periodically for new updates on maintenance needs
  • Make sure you replace filters when needed. Filters should last six months or longer depending on how often they are used
  • The higher the mineral content in your water supply, the more often you should change your filters
  • It’s recommended that you use less than 1 gallon of clean tap water every day when using an RO system to save on the amount of water you need to process
  • You may want to get a water softener if your water is hard; they can be used together to improve your water quality
  • Don’t use hot water with an RO system since this will cause scale build-up in the filters
  • You should always make sure that you get good quality filters for your RO system; some of them are known for producing bad tasting or smelling water
  • Be sure to follow maintenance protocols when replacing filters, and replace them before they expire if possible


Reverse osmosis systems are a great way to minimize the amount of lead, chlorine, chemicals, bacteria, nitrates, and other contaminants in your water. But only if the pressure is up to par.

To fix low pressure in reverse osmosis systems, you can try raising the water pressure to your RO system by turning on the faucet at the highest point in your home. If that doesn’t work, you can always try installing a booster pump. With these two easy fixes, you’ll be drinking clean water again in no time!

Meet the author: Paul White

Paul is water engineer by trade and is very passionate about innovative solutions for water filtration. His goal is to make drinking water accessible and affordable to all. An avid runner, he is currently training for a marathon. “Running is my sanity. Writing is how I organize my thoughts. I’m a poet and writer who is passionate about change. I aspire to be the best version of myself, and to help others do the same.” Learn more about Paul and the rest of the team.