I have a strange problem with my toilet yesterday. When i flush, it
would make a loud croaking sound like someone was using a jackhammer,
but deeper tone. The float(ball) would go down as normal and then come
up with water refilling the tank. Any ideas on what causes the loud
croaking sound? Thanks alot.
Air being sucked through the toilet trap due to a clogged vent, or a
failing float valve causing a repetitive water hammer condition.
Take the lid off the toilet, have your hand ready to lift the float and
when the sound occurs pull the float up to stop the water. If stopping
the water stops the sound and letting it continue to fill brings the
sound back replace the float valve unit (they're cheap). If the float
and water flow are not related to the sound inspect the vent stack for
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