Judith uses a soccer ball that is held in by inflation, and to dump the pc she inserts an air needle to release the ball. It just fits the PVC pipe she has for a drain.
On 12/11/2011 8:05 PM, thelandyachtaustin wrote:
I remember seeing where someone had used a basketball or something like that as the "valve". Held in place with a bungee cord, when you wanna empty it, you just remove the bungee, hit the ball with the end of your shovel-handle...the ball goes flyin & out comes the 'crete.
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