Septic tanks.....again

[farmer0102]

The outlet appears to be 1.5 metres below the inlet and I presume needs to be free draining. My existing tank inlet is maybe a foot below ground with the outlet drain about 18" below ground, though it runs away and ends up deeper, but I doubt it ever gets 1.5m below inlet. Bit of a show stopper for me, unless I installed a pumped output sump which would need electricity to pump it up to outlet drain level.
Even if your exisiting outlet is 1.5 m below inlet, then if you have a high water table in winter then I'd imagine you'd be stuffed without pumping the water away.

Not something I can comment on im afraid that's going over my head a bit. All I know is that so far so good for me. I would give them a call and ask, they were very helpful with any questions I had.

 

[colhonk]

The outlet from mine is near 3ft deep, goes through a bit of a high ground at 5 ft, so an extra nearly 5 foot deeper is a total useless project.