Before you call a plumber, try these chemical-free methods to break up the gunk. 1. The Boiling Water Blast This is the easiest first step for grease-based clogs. Boil a full kettle of water. Pour it slowly down the drain in three stages. Wait a few seconds between each pour.
Hydro-Mechanical and Chemical Strategies for Drain Clearance: A Guide to Unclogging a Sink Without a Plunger