We are enjoying being in our new home near Lake Macquarie in NSW. There are some issues with our rainwater capture system that we feel they could be improved on.
1) In peak down pour conditions the tank over flows. It is situated under the house in a sub floor area which we use for storage/workshop. Having this area flooded from time to time is not good. I am yet to actually see the overflow in action, but suspect that the design and sizing of the tank overflow just can't cope with the catchment (roof area connected to the tank is approximately 208m2).
2) It is a charged down pipe system. The lowest part of the system is a buried near horizontal pipe connecting the catchment on the south side off the house with that on the north and the tank. There is no way to inspect this section of pipe. Surely this section is at risk of blocking with time?
3) The laundry, toilets and one outside tap uses water from the rainwater system. There is a noticeble staining of the toilet bowls starting to happen and no doubt the whites in the wardrobe probably aren't as white as they once were. Is there a filter recommended to mitigate this? I assume I would fit it in the lines to laundry and toilets.
I have uploaded a pic of the tank (3000L) entry and over flow arrangement. The pump is submersible.
Thank you for any advice.