What is a percolation test?A percolation test is a test to determine the absorption rate of soil for surface water soakaways or septic drainage fields. There are two common types of percolation test, they are different and not to be confused.1. Surface water soakaway percolation test.Soakaways have been the traditional way to dispose of stormwater from buildings and paved areas remote from a public sewer or watercourse. In recent years, soakaways have been used within urban, fully-sewered areas to limit the impact on discharge of new upstream building works and to avoid costs of sewer upgrading outside a development.

1. Soakaway Details

Soakaways are seen increasingly as a more widely applicable option alongside other means of stormwater control and disposal.

This spreadsheet makes iterative soakaway design much quicker and easier, allowing the designer to complete an optimal design in minutes.A soakaway is a tank or trench where water is stored and allowed to soak into the ground, rather than discharging to an outfall or sewer. Soakaways are often used in remote or isolated areas, where the existing drainage is not sufficient and would be expensive or difficult to upgrade, or where a SUDS system is being installed to reduce the runoff from a new development. For more details, we have a comprehensive section on this website. Soakaway Design SpreadsheetThe design spreadsheet works by calculating the inflow into the soakaway in all design storm conditions.

Then the spreadsheet calculates the outflow into the soil, and uses this to determine the storage area required. It then checks that the proposed soakaway is capable of storing the required volume of water and is capable of emptying the soakaway quickly enough.The spreadsheet is suitable for non-professional users such as homeowners or farmers, particularly used in conjunction with the Ultimate Design Guide which includes all the information needed to complete an effective soakaway design. Further guidance for non-professional users in included on this website.The spreadsheet is also suitable for professional users. The unique calculations completed automatically by the spreadsheet allows the user to analyse every possible design storm from 5 minutes to 48hrs. The spreadsheet calculates the worst case and uses this to determine the required storage volume.

A unique design graph is produced which allows the professional designer to optimize a compliant soakaway design in minutes.Alternatively you can use our. We can offer bespoke soakaway designs completed in accordance with BRE 365, delivered in just 2 working days.

Soakaway Details

Get the full license version now for only £20. This includes;. Full Soakaway Design Spreadsheet with all inputs available.

Free comprehensive 125 page worth £5. This includes detailed information and typical values for all the required inputs and an explanation of the design standards and principles used in the spreadsheet. Free Infiltration Test calculation tool. Free typical worth £5 (dwg format). Free typical. Free. Free.All purchases are covered by our full money back guarantee.