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Pressure vs Volume – Whats the Difference?

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Water Pressure vs Volume
Urban Piping Plumber Character

Importance of Water Pressure vs Volume

To explain a piping system, the word “pressure” is used to describe the measure of force which plays a vital role in the operation of water equipment like tanks, vessels, pumps and other devices. Volume determines the quantity of water held in a pipe, tank or other device. How can you now explain the difference between water pressure and volume? We are going to use water as a case study for explaining pressure and volume in greater detail.

There are many reasons for people to use water. It is necessary for washing as well as keeping things alive. Whether it’s a farm that needs irrigation or a hot bath that needs to be taken, there are system’s created for each and every situation. These situations may to help store water or to help move water to various locations. Pressure and volume are the two factors that help with the distribution of water.


The pressure coming from a water supply in a household is normally 40-60 psi. The Water velocity coming out of your plumbing like the water heater, tubs, toilets, and faucets is known as water pressure while the amount of water existing in the tubs, toilets, water heater and faucets is known as the water volume.

The water pressure is an important aspect to consider when building a water system. Take note that pressure can also be reduced if a building is high and the pipe transferring water is thin. Thin pipes will not be able to supply enough pressure to the building. This can affect the operation of the bathrooms, tubs, sinks, toilets, ect. Good pressure requires big pipes. The amount of pressure can be achieved in different ways.

Generally, in some domestic environments, we make use of council water usually gotten from massive pipes underground. The pipe which is located in the ground is fed by a very high tower having on top a water supply or a water pump system that pushes the water through the established line. From the watchtower, gravity is used to increase pressure from the water tank.


On the other hand, volume is very important. It helps in the effective distribution of water. Water transfers through a pipe and generates friction as it rubs against the pipe. The thinner the diameter of the pipe, the higher the amount of friction it generates. Thin pipes reduce the inflow of water, and when this happens, the water slows down and supplies a low amount of pressure. The longer the line, the more the drop of pressure from the water source. While trying to get good pressure, plumbers and engineers behind water supply systems need to ensure the pipe is big enough.

How Is Water Pressure vs Volume Affected with Pipe Size

Basically, the higher the flow rate, the more friction it losses. A pipe can only affect pressure and volume depending on its location. A ½” pipe located at the source can create bigger problems than a ½” inch pipe located at the point of discharge.

Use this above scenario and apply it to your kitchen sink. You might not really notice a difference until a dishwasher calls for water in the same period a faucet is opened. Pressure drops will happen. A specific flow must be reached and must be within a specific pipe size.

Causes of low water pressure or low water volume

Different problems can arise from low water pressure or low water volume.  Some of this can be caused by the plumbing pipes, the problem from a water heater, well pumps and well pressure tanks. This issue most of the time is caused by the plumbing pipe in your home which may be filled with sediment and the diameter inside the pipe has reduced in size.

Sometimes it can be caused by the hot water heater which normally collects enough sediments and later clogs the inside of the pipe. You need to constantly take notice of all these issues so that you wont have issues with water pressure. Low water pressure can be prevented if preventative measures are taken.

The pressure reducing valves and the pressure control valves.

When dealing with water pressure, there are a lot of PRVs and PCVs in the market. They are created to maintain pressure and reduce the pressure that is coming into a system. When the pressure comes in, they also help reduce excess pressure which may be produced from the system.

Every pressure reducing valve is allowed to take in some amount of water until it reaches its maximum level. When it reaches it’s maximum, the water valve automatically closes down. The only ground in which it can open is of the pressure valve drop beyond its maximum rating. This advantage of this is that the pressure will deliver a good flow and will remain within a safe range.

Remedies for bad water pressure and volume.

The pressure that comes from water can only be reduced if the pipe is small.  For there to be a great overflow of water through a pipe, the pipe has to be big enough to hold any amount of water. But when a problem arises, how do you fix low or bad water pressure or a bad water volume? First of all, you need to call a professional plumber to help find the problem. This has to be done quickly without delay. Contact our friendly plumbers at Urban Piping Ltd. Our company has been known for fixing these issues.

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Picture of Corey Hayes

Corey Hayes

Corey Hayes is a seasoned marketing professional with two decades of experience in small business marketing, dedicating 15 years of his illustrious career to elevating Urban Piping's brand. His expertise and visionary approach have been pivotal in shaping the company's market presence and success.

Picture of Corey Hayes

Corey Hayes

Corey Hayes is a seasoned marketing professional with two decades of experience in small business marketing, dedicating 15 years of his illustrious career to elevating Urban Piping's brand. His expertise and visionary approach have been pivotal in shaping the company's market presence and success.

Graham Drew

Graham Drew is the pioneering CEO of Urban Piping, a leader in Poly B pipe replacement with over 15 years of specialized home repiping experience. Renowned for completing more Poly B remediations than any other contractor, Graham has set industry standards, ensuring homeowners receive the utmost in safety and quality. His visionary approach and unwavering commitment have solidified Urban Piping’s reputation as the go-to expert for dependable and innovative piping solutions.

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