There are no upper limits on the pressure of water which we supply to our customers, but very high pressure is unusual.

High pressure is normally noticed by a strong spurt of water out of the cold tap.

If you have just moved in to the area it may be that your pressure is simply higher than you are used to.

High water pressure can also be caused by work we are carrying out on our supply network.

If you experience high pressure for the first time, you can run your tap for a couple of minutes. If there has been maintenance work on our network it is possible that air may be trapped in your pipes, temporarily increasing pressure.

Reducing pressure
If your pressure seems to permanently be higher than you like then turn your stop tap off slightly. This will restrict the pressure with which water can enter your property.

If your high pressure is persistent or causing concern then please report a problem.

Pressure is different to water flow. Water flow is the amount of water that you receive and is dependent on the size of the pipe entering your home.

Knocking in the plumbing is known as water hammer. It's caused by pockets of air caught in the water supply. These then bang against the side of the water pipes, causing them to knock or vibrate.

If you are concerned your internal plumbing you are advised to contact an approved plumber.

Water pressure is a measure of the force which pushes water through our mains and into your property.

Pressure is measured in a unit called ‘bars’, with one bar forcing water to a height of 10 metres.

As part of our customer promise, we aim to ensure that your water pressure is no less than our target of one bar at the boundary of your property.

If your water pressure has dropped:

• Check to see if your neighbours are affected too.
• Check if there is a known issue in your area
• If you can’t see the issue listed please contact us.