On 1/16/2016 3:49 PM, dpb wrote:
The traps could be drying out by evaporation. The place has been
empty in between gurgles, consequently no water was going down the
drain during those times.

+1 as first choice if there's no visible leak

Although only a month to six weeks seems pretty quick, the water surface
level only has to below the bottom level of the U by a fraction for
there to be an air break so it's not like the trap has to be completely
dry.


If it's evaporation, you may be able to keep
the water in by covering the drain with some
thing. Bit of rubber, duct tape, saran wrap.

I'm unsure if a couple drops of mineral oil
into the drain will coat the surface of the
water and help reduce evaporation. Maybe?

-
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Christopher A. Young
learn more about Jesus
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