On Aug 6, 10:18 am, terry wrote:
On Aug 6, 9:42 am, valvejob wrote:





On Sun, 5 Aug 2007 23:17:47 -0500, "DanG" wrote:
These things probably have traps in the bottom. It would seem
that you are losing the water trap on the last 3.

They can dry out from non use. Simply add water.
They can leak out through a crack or a hole or be eaten up by
acid/chemicals. Install new traps.
They can be sucked dry because of a venting error. Replumb.

Definitely a p-trap is not holding water, which acts as a barrier to
the odor of the sewer backing up.

But the problem could be lack of a vent to the roof on the sewer line
right before the traps. Or if there is one, it is stopped up. That
causes siphoning which drains your p traps.

The city also might help you by checking for backups on thier side.

You 'might' solve it in the short term by always running some water
down each drain before you close up for the night.- Hide quoted text -

- Show quoted text -

Thank you all.
I could not check the vent to the roof beacause I did not have the
ladders high enough to reach the vent.
I have run the water down the drains of those 3 chairs and it worked,
no more smell the next morning. The problem as you all said could be
the traps dried out from not using for a while (it's the slow season
now). I really want to take a look at the vent on the roof, it's just
a plain pvc pipe without any thing at the end.