The gurgling you hear from the sink when you flush the toilet may sound innocuous, but it can spell trouble if you let it persist.. The gurgling is produced as air passes through the sink P-trap, and if there's enough to empty the trap, there won't any barrier between you and nasty, methane-rich sewer gases.
When flushing the toilet causes a sink to gurgle, it's because their drain pipes are connected.. These usually connect to a common vent, and when it's blocked, the vacuum can pull air in through the sink trap. The gurgling sound you hear is air passing through the water in the trap.
Cover the bathtub drain or sink drains, depending on where you hear the gurgling, then attempt to plunge your toilet. If there is a blockage in your pipe, work the .
So earlier today whenever someone flushed my bathroom toilet, the kitchen. The Studor vent is WHY the sink is gurgling, but there is also a problem in the .