In WA, it is your legal obligation as a homeowner is to retain your stormwater on your property. The installation of soakwells is an effective way to achieve this. Your local council has provided you with recommendations for the volume of soakwell to install in your property, calculated as a multiple of the catchment area. Installing this volume of soakwell will lessen the risk of overflow during heavy downpours. However, you are not legally obliged to install soakwells. As such, the volume of soakwell recommended by your council is a guide only, not a requirement.

The majority of local councils in Perth have used the 1 in 20-year rainfall event to calculate the recommended volume of soakwell. Generally, this equates to the catchment area (m²) multiplied by 12.5, as shown below.

Volume of soakwell (L) = Impervious area (m²) x 12.5

Two exceptions are; The City of Gosnells and The Town of Cambridge, who have both specified volumes calculated for the 1 in 100-year rainfall event.

Please follow the links below if you would like to find out more about your local Western Australian council regulations regarding stormwater drainage and soakwells.


Terms and Conditions

Dispatch and Deliveries

All order submissions are obligation free until the final invoice has been issued and confirmed by phone or email. If delivery is required, the fee will be determined upon submission of the order. As standard, delivery is free within 10km radius of Banksia Grove, and capped at $25 for deliveries within 35km of Banksia Grove. Delivery is free for orders over $1000 within 35kms of Banksia Grove. All prices include GST.

Payment for supply of materials will only be accepted once the dispatch and delivery details have been confirmed by both parties and an invoice issued. All materials will be inspected upon arrival/collection and will be free from damage.

Once you have submitted your order request, Simply Soakwells will contact you to confirm your order, delivery fee (if any) and delivery/collection date. Upon acceptance, an invoice will then be issued with the payment details.

Payment can be made in cash on delivery, by electronic transfer or by credit card over the phone or via our on-line payment gateway (1.4% surcharge).


No returns will be accepted after payment, dispatch and/or delivery of materials has been completed.


While Simply Soakwells will endeavor to provide you with the best advice and materials to ensure you complete a professional soakwell installation that will last a lifetime, in the spirit of DIY projects, Simply Soakwells accepts no responsibility for failure of soakwells or soakwell plumbing as a result of weather or non-weather conditions. Simply Soakwells is also not responsible for any costs incurred by the owner or any third party as a result of failure of soakwells or soakwell plumbing.

Online Payment Terms & Conditions

All prices are shown in Australian Dollars ($AUD). Credit card transactions are processed securely through the CBA Virtual Payment Client gateway and attract a 1.4% processing fee. We do not store credit card details. After payment, an invoice will be issued to you as confirmation of your transaction. If you have been charged in error, please contact us to discuss a refund.

Privacy Policy

Web Site Privacy Statement

This Privacy Statement sets out Simply Soakwells’ policy relating to the collection and use of your personal information on the Site. The Site may contain links to other websites. Simply Soakwells is not responsible for the privacy practices of those other sites. Simply Soakwells respects your privacy. Our privacy principles embody the National Privacy Principles in the Privacy Act 1988 (Privacy Act).

Collecting your information using this website

We only collect personal information from this Site when it is provided voluntarily by you. The extent and type of information we receive from you otherwise depends on what you do when visiting the Site. If you visit our Site to read or download information, such as news items, much of the information we collect - such as the domain from which you access the Internet, the date and time you access the Site, and the Internet address of the website from which you linked directly to our Site - is statistical only and not personally identifiable. We use information about the number of visitors and their use of the Site in aggregate form to make our Site more useful and attractive to you.

How we use and disclose your information

We only use your information to respond to your specific queries and do not disclose any information provided to third parties unless required by law or authorised by the Privacy Act. We will handle personal information relying on the employee and related bodies corporate exemption in the Privacy Act where these exemptions are relevant.


We use a variety of physical and electronic security measures including restricting physical access to our offices, firewalls and secure databases to keep personal information secure from misuse, loss or unauthorised use or disclosure. The Internet is not a secure environment. If you use the Internet to send us any information, including your email address, it is sent at your own risk.