How To Test Your Home Water Pressure Step By-Step

Knowing how to test your home water pressure is very crucial for every home-owner. This is because testing the water pressure a couple of times a year can help you identify an impending problem and then quickly find a solution to it before it becomes worse.

The process of testing water pressure is simple and straightforward, and all that is required is a simple and affordable pressure gauge. Some homes even have specialized gauges that are connected to the water line so that homeowners can check the water pressure quickly and simply with a peek at a display screen.

This article will serve as an expert guide on how to test water pressure and why you should test your home water pressure on a regular basis. And finally, what to do when the water pressure is high or low.

Why Should You Test Your Home Water Pressure?

It is crucial to test the home water pressure at least twice a year to know when the pressure is high or low, and this will also help you notice before time when any part needs to be changed.

It is possible for high water pressure to cause damage to pipes, water softeners, tankless water heaters, faucets, and appliances. The likelihood of a blowout in flex lines and washing machine hoses is significantly higher, which might result in a flood in your house. Get the NU Aqua Efficiency Series Tankless 600GPD Reverse Osmosis System 2:1 Pure To Waste.

 Even if your house has a pressure regulator, also known as a pressure-reducing valve (PRV), on the main water supply line, it is a good idea to check the water pressure because it is not always visible when a pressure regulator ceases to function properly. 

The more you check the water pressure, the easier it will be to figure out if your regulator isn't working properly before it causes damage to your plumbing system.

How To Test Your Home Water Pressure

To test your home's water pressure, you'll only need a simple, low-cost pressure gauge, which you can get at any hardware or home improvement store. Look for one that has female hose threads for a simple connection, a rubber gasket for a tight seal, and the power to measure up to 300 pounds per square inch.

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When you get the equipment listed above ready, then follow these simple and straightforward steps to measure your home's water pressure:


Turn off the water in your home, both inside and out.

Turn off all faucets and showerheads, as well as dishwashers, washing machines, ice makers in refrigerators, and sprinklers. A low pressure reading could be caused by water moving somewhere in your plumbing system.


Connect the gauge to a faucet or hose bib on your home's exterior.

If your water comes from a municipal utility, choose the one nearest to the water meter. If you have a well, use a hose bib that is as close to the pressure tank as possible.


Tighten the gauge by hand and fully open the faucet.

Turn the faucet off and tighten the gauge with pliers if water leaks out while you're doing this. It is important to get a good seal as it is required for an accurate reading.


Determine the pressure by looking at the gauge.

Between 45 and 55 psi is an excellent reading range. You should take action if the pressure is below 40 psi or beyond 80 psi.

That's how easy and straightforward it is to test your home's water pressure. Like this post?

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What To Do When The Water Pressure Is High Or Low

Consider the recommendations below when your water pressure is too high, too low, or just normal pressure.

1. When The Water Pressure Is Very High

Water pressure regulators installed on the water main to provide a maximum flow of 75 psi should be taken into consideration. 

The water pressure in your home should be checked regularly, even if you already have a pressure regulator installed, since these devices might fail without causing any obvious symptoms.

2. When The Water Pressure Is Very Low

If you have a pressure regulator, make sure it is working properly. It should be set to 50 psi by default, but you may increase or decrease the pressure by adjusting the screw on top. 

Alternatively, if a pressure regulator is not at fault, the local water company may be responsible for supplying insufficient water flow to your residence. In order to solve this problem, you can put in a water pressure booster. This will make more water flow when a faucet is turned on.

3. When The Water Pressure Is Just About Normal

There is nothing further that has to be done. You can put your pressure gauge aside for a few months until you have another test scheduled.

What is the RO feed pressure?

Reverse Osmosis feed pressure is the system that inserts pressure into a stream of water in order to counteract the natural osmotic pressure. A semipermeable membrane is used to drive the feed water through. Clean water comes out of the process, but a concentrated solution of dissolved particles is left behind in the process.

Osmosis occurs when water with a low concentration of natural solids flows across a membrane to a higher concentration area because of natural osmotic pressure. This equalizes the concentration of the solute on both sides of the membrane.

How Much Water Pressure Does A Reverse Osmosis System Need?

A reverse osmosis system must have a minimum operating pressure of 40 psi, although it is preferable to have a maximum operating pressure of 60 psi. 

If your supply pressure is lower than the reading above, your system will generate water at a much slower rate, waste will increase, and the filtering will not be as complete as it should be. 

Furthermore, the storage tank will gather water at a slower rate and shut down at a faster rate. It will only require 30 psi in the tank to operate the shutdown valve if your feed pressure is just 45 pounds per square inch (psi). 

By boosting your feed pressure, you will be able to increase the amount of water your tank can retain before it is forced to shut down.

Do I Need A Booster Pump For My Ro System?

A minimum of 40 psi of pressure is required by reverse osmosis membranes for effective operation. Booster pumps are installed in order to increase the amount of water pressure that enters the RO system.

 Most RO systems do not need a booster pump because the water pressure in the mains usually meets their needs, so they don't need one.

The quantity of drain water generated rises as the intake pressure decreases. This results in a reduction in the amount of drinking water produced as well as a delayed filling of the storage tank, which results in poor quality water and early membrane fouling.

Under 40 psi, the pressure is often thought to be too low, but this can be fixed by using a pressure booster pump that will change your incoming pressure to the right level.

How Much Pressure Should An Empty Ro Tank Have?

The air pressure of an empty RO tank should be between 7 and 10 psi. The air pressure in a fully loaded or heavy RO tank should be 30–40 psi. In order to be precise, the air pressure should equal two-thirds of the entering water pressure.

When the tank is completely full, and if the supply water pressure to the RO system is 60 psi, the tank should have a pressure of 40 psi. The interior of the RO tank has a bladder that is responsible for separating air from water.

The air valve linked to the compressed air chamber is located on the lower side of the tank on the lower side of the tank. Connection to the pure water chamber is made by way of the top water inlet/outlet port (where the tank valve is situated). 

To make things even worse, when you turn on the faucet, you'll get compressed air, which will squeeze the bladder and force water out of the tank.

What Happens If Ro Tank Pressure Is Too High?

When reverse osmosis tanks are empty, they must have a pressure of 8 pounds per square inch. Unless the water pressure within the tank is sufficiently high, the water contained in the RO tank will not flow out of the faucets.  

The opposite is also true: if the tank pressure is too high, the water going through the filters will not enter the RO tank. Get a perfect filter replacement for remineralizing your water. You can also get our complete NU Aqua Reverse Osmosis Systems.

To check the pressure in the tank, you must first switch off the system's feed water supply and completely drain the tank. A pressure gauge is used to determine the amount of air pressure present in the tank.

What Happens If Ro Tank Pressure Is Too Low?

If the pressure within the tank is too low, you can use a bicycle pump to re-pressurize it until it is at the proper pressure. This is due to the fact that the air valve on the RO tank is the same as the air valve on a bicycle tire, which is referred to as the Schroeder valve. In order to pressurize the tank again, you must empty out the water that has accumulated in it.

After draining the tank, pump air into the storage tank until it achieves the optimum pre-charge pressure of 8 pounds per square inch for most RO tanks. Utilize the pressure gauge to check the pressure as you pump in air. Otherwise, the tank may get over-pressurized.

How Do I Increase The Pressure In My Ro Tank

By adding an ancillary electric booster pump, the RO production rate can be increased while the pressure tank storage volume is also increased. This results in more contaminants being rejected and an increase in faucet flow rate, even if the reverse osmosis membrane pressure rating is met by the water supply.

 Residential RO systems are equipped with diaphragm booster pumps, which may raise the supply pressure by up to 75-100 PSI on average.