| A "bubble" indicates a clogged line while a "gurgle" indicates a blocked vent. let me explain. When you flush the discharge drains down the pipe untill it hits a partial clog. Then it rebounds back sending a "bubble" of air ahead of it. When you flush a toilet or drain a bathtub a suction is created by the water rushing down the pipe. This suction is relieved by a open pipe that runs to the outside called a vent. When a vent's stopped up the suction has to relieve itself somwhere, in this case your toilet. The noise you hear is the air being pulled through the trap by suction, (gurgle).
You see bubbles in your bowl which would indicate a partial clog in your drain line.
Your complaint, "my dowstairs bathroom toilet bubbles and loses it water."
Puts the blockage down stream from the downstairs bathroom so that would indicate that's the vent, (the lavatory vent),you need to go down with a power snake to clear the line. Good luck, Tom |