[Bikers4Bush]

This is something I have never heard of before and am completely unfamiliar with.

I'd appreciate a little education sans the graphic details.

[eastsider]

Personally, I've never had the back-up problem, but then again I've never had an apartment in Manhattan below the 10th floor or lived in an building that was built prior to 1960.

The problem I do encounter is sudden changes in the shower temperature. My solution has been to let the shower run for a minute or two before getting in and let everyone else in my apartment line who's taking a shower make whatever adjustments they want before I get in. If that doesn't work, I run the tub and alternate the temperature from all cold to all hot in 5-second intervals for another minute or two until everyone else in my line is driven out of their showers. Works like a charm : )