Cleaning the Drain Air Vent If you feel the drain air vent might be blocked, use a sturdy ladder and climb towards the roof to remove leaves or debris clogging the vent. For blockages brought on by tree roots, gurus use specialized instruments to chop via and remove the roots. https://spencer5yhpt.theobloggers.com/37262188/the-best-side-of-methods-of-cleaning-sewage-drains-in-buraidah