Common Causes of Bathtub Drain Clogs

Bathtub drains clog when materials accumulate faster than the pipes can handle them. The most frequent offender is hair, which strands along the sides of the drain and combines with soap and oils to form a stubborn barrier that narrows the passage over time.

Soap scum is another major contributor. Soaps, detergents, and body oils leave a filmy residue that traps hair and mineral particles, creating a sticky blockage that slows drainage or stops it altogether.

Mineral buildup from hard water can also reduce drainage efficiency. Over months and years, minerals like calcium and magnesium precipitate out and form crusty deposits inside the pipes, narrowing the diameter of the drain line.