- 1). Place the tip of flexible funnel in the drain hole at the top of the basin. If the drain hole is covered with a guard plate remove the plate with a screwdriver.
- 2). Pour drain cleaner into the funnel, following the manufacturer's instructions. Liquid foaming drain cleaner is manufactured in a two-part solution that is activated when the solution mixes together as it is poured into the drain. Allow the drain cleaner to sit in the drain according to the manufacturer's instructions.
- 3). Fill the basin with water to reach the level of the overflow pipe's drain hole. Repeat the procedure if the overflow tube is not draining freely.
- 4). Insert a small drain snake or long-handled wire brush into the top of the overflow tube. Work the snake or brush all the way to the bottom of the tube and back up again while twisting the handle in a circular motion.
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