CG> For $24 I can get a 10-foot length of six-inch diameter PVC
JH>Wild! Go for it. Better yet, market it.
I might at that. Yesterday I realised that a twin-tube model 
would be even better. There is space (laterally) on the wall of 
the bin for two tubes, and no extra space occupied on the floor, 
since the footprint is determined by the bin's area.
The first tube would be a primary digester. Office paper and the 
like. The second tube would receive output from the first - 
partially digested waste - plus kitchen waste. The wrigglers 
digest the kitchen waste so quickly.
         diam"    rad"     height"  area""   volume"""
tube     5.25    2.63       48.00  21.66      1,039
pail    10.25    5.13       14.00  82.55      1,155
Here's a sad truth. A four-foot pipe has about the same volume as 
a restaurant pail. In theory, I'd need eight lengths of sewer 
pipe to be as effective as eight pails in the laundry closet.
I'd thought that the pipes would be more effective as they gave 
the worms a larger volume of material, and that they would go to 
the richest source, i.e. chomp away at the better waste before 
attacking the almost-completely digested waste. 
Instead of having eight populations, some starving some pigging 
out, I figured that the pipe would provide a level playing-field.
I've not expressed myself too well here.
Truth is I'm disappointed that I didn't do my usual back-of-the-
envelope calculation before expecting higher efficiency.
I am still happy with the smaller footprint. Obviously (?!!) if 
I'd used a pipe twice the diameter i'd have four times the 
volume. I should start looking now for a twelve-inch pipe.
christopher.greaves@ablelink.org     www.interlog.com/~cgreaves
 * 1st 2.00b #6263 * Don't Brake!
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