My drainage plan shows that I need a whopping 6.8m3 of soakaway which seems pretty enormous.
According to the calculations from the drainagepipe.co.uk website I need 2.0m3 other on line sources lead me to a similar figure but I can't find a definitive calculator as opposed to these 'ball park' calculations. Does any one know what the proper calculations are? I have the results from my DIY percolation test.