Why does water pressure matter?

Water pressure is what pushes water through pipes to determine the flow that comes out of taps. If pressure is insufficient, you may experience a trickling of water which makes filling a sink or kettle a lengthy process. The height of a building can also determine the pressure received.

According to Section 65 of the Water Industry Act (2003), a constant supply is required at sufficient pressure to allow water to reach the top of the highest level of every building – both domestic and commercial – within the water supplier’s region.

What are the Causes of Low Pressure?

Low pressure can have several causes:

  • when demand for water is high (e.g. in the morning or early evenings).
  • during dry spells when people use hosepipes or sprinklers to water their gardens.
  • inadequate pumping facilities.
  • water mains that are too small.
  • reduced pressure from the water main because of leakage, equipment failures or blocked service pipes
  • Work in the area
  • A water leak.

What are the Causes of High Pressure?

High water pressure is less common than low water pressure. If you have high pressure it could be caused by:

  • Trapped air in the water pipes
  • Work in the area
  • Stop tap open too much


Water Supply Pressure in Buildings

If a company, hospital, school, block of flats etc is located over multiple floors or in a tall building, it will need more water pressure throughout the building. Pressure regulation is required to make sure a constant and appropriate ideal water pressure occurs at every level. 

The water system in a tall or multi floor building is rarely supplied directly from the mains, but usually fed at a high pressure by booster pumps. This ensures delivery to the top floor at adequate pressure.  

Too much water pressure can cause plumbing problems, so its important to keep it under control.


Click here for more information.