Gurgling drain pipes indicate that trapped air is escaping upward through your P-trap because of a ventilation restriction or a partial clog. To fix it, inspect your roof vent stack for leaves, bird nests, or debris blockages and clear them away to restore proper barometric airflow. If the vent is clear, use a hand-cranked drum auger or plunger to clear out any partial grease or hair restrictions lining your branch drain pipes. Verification: Run water through your plumbing fixtures to confirm that gurgling sounds have completely stopped.
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