wrote in message
...
In alt.solar.thermal wrote:
snip
I have always thought that greywater should be plumbed separately anyway,
allowing it to be used as desired for toilets and gardening.
I think in some areas there are plumbing code issues.
But I knew a retired engineer in Michigan that when he built his retirement
home, he had black water and grey water drains separated. Ran the black
water to a conventional septic system, and the greywater to a less involved
drywell/drain field.
After ten years, the septic system installer offered to open up the tank for
the 'ten-year warranty' inspection. When they did, it was remarkably
'clean' in that it did not have much silt or other 'non-degradables' in the
tank. Of course, the septic tank had a pretty low flow rate with just a
retired couple and no greywater.
I too have often thought this is a good idea. Especially when not on city
mains sewage.
daestrom