notbob wrote:
>
> I guess the reason why I've eschewed this particular device all these
> years --there were accomadations for one in my last place and I never
> even considered installing one-- is that my grandparents always
> sternly admonished my brother and I to not TOUCH that thingie under
> the horrible threat of NO DESSERT! or some other heinous retribution.

My mom didn't use the one on her sink because it
would cause the water to turn rusty. There was
a sort of hydraulic ram effect which would knock
loose rust from the inside of the pipes.