1st, 2nd and 3rd floor kitchen sinks, stacked one over the other, seem to drain ok. problem is that that when 3rd floor kitchen sink drains there sometimes is soap foam or minor backup into 1st and 2nd floor kitchen sinks. and gurgling noise from 1st floor sink. i haven't been able to try draining 1st and 2nd floors to see if they cause gurgling on the other floors.
older building, started a month or so ago.
does this sound like a clogged vent problem? or more possibly a clog?
older building, started a month or so ago.
does this sound like a clogged vent problem? or more possibly a clog?