On Tue, 22 Nov 2005 21:48:08 +0000 (UTC), SR wrote:

So, what's the best upgrate plan?

Even if you fit the most expensive digester you can find, the only
cure the drainage problem is loads of land drains, almost horizontal.

My advice, based on what I did a couple of years ago: keep the
existing tank, fit dip pipes if there aren't any, then dig out the
largest area you can manage for the soakaway.

My soakaway is about 100m in total, laid in terraces to keep them
horizontal, and on top of the heavy clay. And the best bit is, it's
all in my next-door neighbours garden!

--
Nigel M