On 5 May 2005 08:20:20 -0700, someone wrote:

I think I'll quit, my head hurts.

Harry K

Harry, the piping in the house isn't necessarily arranged to be
pitched uniformly to either end. It could easily run up and down such
that there are low point or entire runs filled with water even if each
end is drained.

Some houses, the opening both ends thing could work, most it would
not, as some additional energy would be needed to blow or suck the
standing water out of the low areas.


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