How long does it take for vinegar to unclog an AC drain?

Pouring distilled white vinegar down your air conditioner drain line typically takes anywhere from fifteen to thirty minutes to help break down and dissolve minor organic buildup, slime, and algae clogs. Vinegar contains acetic acid, which acts as a natural cleaner that loosens biological obstructions inside the PVC pipes. To achieve the best results, pour about one cup of straight vinegar or an equal mix of warm water and vinegar into the T-shaped vent opening of your indoor drain line, let it sit undisturbed for twenty to thirty minutes to work its way through the blockage, and then flush the line with a gallon of clean warm water. However, it is important to note that if your drain line is completely plugged with a hard, solid mass of accumulated sludge and debris, vinegar alone will not instantly clear it; in those stubborn cases, you will need to use a wet-dry vacuum on the outdoor drain exit to physically suck out the blockage.