On Fri, 24 Aug 2007 21:08:08 -0500, Martin H. Eastburn wrote:
And one drains lots of water afterwards less drains are messed up.

yes, though it applies less to plastic piping.

I remember when the cast iron pipe that ran overhead in the physics department
split open. Seems that for years a slow and ever present drip of acid from
all work stations (chemistry lab) above us ate the bottom of the pipe out.

Replaced it with Quartz that is really protective.

This 80% stuff is very scary. I am afraid that they may stop selling
it.

i