Olmost handy man

[Olmost handy man]

My house is 14 years old. All of a sadden my toilet on 1-st floor started to flash sluggish. I was thinking its clogged but then after 3 flashes in a row it flashed fine & then again slow. It goes on & off.
I think the vent pipe is clogged. What do you think?

[HayZee518]

check the stack for a bird's nest and use a cutter drain auger to clear it out. the toilet should drain freely qhwn its flushed. you have atmospheric pressure on the water surface in the toilet and the waste system should be open to this same atmosphere through the vent stack. a blockage in the vent stack could create a vacuum allowing some water to drain but a larger influx of water would back up.