Browse Forums Building A New House Re: Storm water drains and soakwells 22Sep 18, 2009 7:52 pm Building with CELEBRATION HOMES @ THE GLADES in BYFORD W.A. My Build thread: viewtopic.php?f=31&t=19512&p=249550#p249550 Re: Storm water drains and soakwells 24Jan 03, 2011 3:39 pm Hi there, just thought I would provide some info for those of you seeking information regarding how may soakwells you require, and if you even require them at all. This information pertains to WA only. 1. A simple call to your council will determine if you do or do not require soakwells, ask to speak to the engineer. 2. Number of downpipes is irrelevant, volume requirement is based on the total catchment area of your property ie. your roof and in some cases driveway. 3. Volume is determined using a formula provided by the council that allows for the 1 in 25 year storm event, for most councils it is .0125/.0122 multiplied by the total catchment area. The answer is in kilolitres, ie. 1.56 equals 1560 litres. 4. Once volume requirement has been determined simply divide it by the total volume of the soakwells you intend to use and you have the number required. Most professional installers use two or three larger concrete soakwells such as 1500x1200's. 5. Most councils DO NOT permit the use of PVC soakwells. 6. Non compliance notices ARE issued and WILL cost you a lot of money. Do not be tempted by the prospect of saving a few hundred dollars now for less volume than required, or for inferior products. 7. Lastly, CONTACT YOUR COUNCIL if you have any questions regarding volume requirements. Hello I am developing 2 side by side units. Wish someone can help me on the following questions 1) Which stage should be the storm water pipe installed during the new… 0 7827 If you need to be able to access these then you may need to dig them out and cut them so you can add a socket and a riser to the required height. We normally add a… 1 6853 Thanks for that, the PVC pipe is still about 40cm below ground level and it sticks out of the sand with no end cap or anything on it just open pipe, is this the finished… 2 10484 |