To close this thread off......
In consultation with our builder, it was agreed that he would reduce the roof catchment being diverted to the tank to the northern roof area only…

Sorry, probably a silly question......but "IMHO"?
If you would be good enough to scan the info and charts related to horizontal flow above invert, that would be much appreciated.

Yes, I can…

Thanks SaveH2O! You have been an absolute treasure trove of information and ideas. I intend to spend some time tonight consolidating all the input and proposing a pathway forward for…

Sorry...meant south east corner.

Hi SaveH2O,
Thanks for your further advice. All very interesting.

Maybe..........Anything is possible. What did you have in mind.
I have had a chat with a salesman at the tank manufacturer. His response…

Thanks SaveH2O for your very thorough consideration of our issues.

Some observations and questions…..

It does astound me somewhat that there is such an absence of clear guidance and…

Hi SaveH2O,
The section of pipe I refer to buried along the eastern side of the building is not a sump in my mind as there is no designed access to…

We are adjacent to bush. We have gutter guard installed on all gutters. The water is generally clear with sediment evident on the floor of the tank. The submersible pump…

Hi,
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)…