Suggested was to drop in a little oil that would float on top of the
water and would not evaporate.

On Tue, 03 Oct 2006 20:19:03 -0500, DK wrote:

I remember a year or two ago, there was a poster who had a mansion
house with many rooms. He was complaining that his house often filled
with sewer gas fumes and smelled like sh*t..

The solution was simple. He walked thru the empty rooms once every
day or two and ran a cup of water in each drain and refilled the
'traps' which blocked the sewer gas.