High and low water pressure

Water pressure can vary from property to property, typically due to the topography of the land (hill and low lying areas) and the flow of water through the local pipe network. This is common in the Perth Hills and some regional areas.

Under our Water Services Licence, we deliver water pressure within a standard range of 15 to 100 metres head (mH) in the metropolitan area, and 13 to 100mH in regional areas. Metres head is the measurement used to determine water pressure, which refers to the height (head) which water rises vertically in a pipe. 

To find out if your property receives water pressure outside the standard pressure range, enter your customer account number into the Water Pressure Exemption Search or property address in the map of Pressure Exemption Areas below. You can find your account number in the top right hand corner of your water bill or online via your MyWater account.

Please note: if you have a Pressure Reduction Valve installed your account will not appear in this search as having high pressure.

Pressure search

Pressure Exemption Areas

100-120 100m-150mH  120-150 over 150mH   180-200 Less than 15mH  over200 Less than 13mH   

Disclaimer: Please note this map is current as at May 2018 and may be subject to change.

Frequently asked questions

Water Corporation is issued with a Water Services License by the Economic Regulation Authority (ERA) under the Water Services Act 2012.  The purpose of a Water Services Licence is to set minimum service and performance standards.

Pressure is measured at the service point to the property. The pressure supplied at this point is intended to allow sufficient pressure to be provided to an envelope measured 30 metres from the property’s boundary where the water service is located. This is standard practice for regular sized residential lots, where typically the 30 meter envelope covers most of the property.

However, it is difficult to provide standard service level to all parts of larger block where the topography can vary considerably and consequently pressure may vary at different points on these properties.

Water pressure generally varies between different households. Typically, due to the geography of the land, in hilly and low-lying areas, it’s difficult to ensure a consistent range of water pressure through the water network.

Customers who own properties that are exempt from the pressure requirements of our Water Services Licence are responsible for managing their own water pressure. 

Pressure is the force which pushes water through pipes and determines the flow of water from the tap. 

The amount of pressure at your tap depends on how high the service reservoir or water tower is above your home. Properties at the top of a hill may have a different pressure to properties lower on the hill. High pressure can be a result of being lower on a hill and/or situated below a reservoir or water tower.

Plumbing fixtures and household appliances are designed to operate within particular water pressure specifications. Damage can be caused to pipes and appliances where water pressure specifications are exceeded.

High water pressure can also increase the occurrence of leaks and bursts and could potentially shorten the life of appliances and plumbing fixtures.

High water pressure may also cause excessive noise in your water pipes.

If you are interested in reducing the water pressure inside your home, but not to other areas of your property i.e. reticulation, we recommend contacting a certified plumber to discuss further. Search for a Waterwise plumber online at watercorporation.com.au/waterwise 

If you are interested in reducing the water pressure to your entire property, register your details using the customer form below and a customer representative will contact you to discuss further.

Should you have any concerns regarding your internal plumbing, or if you're interested in reducing the water pressure inside your home, but not to other areas of your property i.e. reticulation, we recommend contacting a certified Waterwise plumber to discuss further.

Search for a Waterwise plumber

You will probably already be aware that your property receives low pressure, the effects are fairly obvious when you turn on your tap. The biggest affect this will have on you is the flow rate of your water supply. Simply put, it will take you longer to fill up your bath compared to someone with higher pressure. 

If you are interested in increasing the water pressure inside your home, there are some measures you may wish to take, at your own cost.

Installing a small storage tank and a booseter pump can assist by allowing water to collect and them be pumped through at a higher pressure. Alternatively, fitting larger diameter pipes and/or fittings in your internal plumbin, which reduces pressure loss due to friction, can also help.

We recommend contacting a certified plumber to discuss further.

Search for a Waterwise plumber

Being exempt from water pressure standards does not change your current water bill costs.

However high water pressure may result in higher water usage and hence a larger usage bill. For example, the higher the water pressure, the more litres per minute the shower will use. 

High water pressure may also increase the risk of leaks and bursts. Undetected leaks will increase your water usage. 

Having low pressure typically means you may use less water. For example, the lower the water pressure, the fewer litres per minute the shower will use. 

For water saving tips, or to check your rostered watering days, see our Save water section. 


Property owners are advised that the assessment of maximum pressure is based on an area of the property, measured 30 metres back from the block's supply point. Unlike standard residential sized blocks, where generally the whole lot is within a 30 metre distance, it is difficult to provide standard service levels to all parts of large blocks.

A water pressure exemption notification will be included on the Landgate Property Investment Report. This will allow prospective buyers to determine if a property has a water pressure exemption.

A notification will also be included on your Water Corporation customer water use and service charges account.

Yes, impacted customers will be notified on an annual basis via their customer service charges and water use bill.

As a strategy for reducing water loss, we also run a water pressure management program. This program aims to reduce water pressure in targeted areas, where pressure can exceed 50mH. Following the implementation of the program, we will continue to deliver above our license requirements. 

Water pressure management

Contact us

If you are interested in reducing water pressure to your entire property, please register your details below and a customer representative will contact you shortly.

High and low pressure areas