Why We Avoid Chemical Drain Cleaners

Why it matters

A stubborn clog does not go away when the chemical fails. It stays, now topped with a caustic pool. Whoever unscrews the trap or feeds a cable next, you or a plumber, risks splashes to eyes and skin.

The routine, in order

A safer sequence for a slow or blocked drain:

1. Grab the obvious. Lift out the pop-up and fish the grey wad of hair out with a zip-strip from the hardware aisle.
2. Plunge like you mean it. Flat cup on basins and tubs, the bell with the skirt on toilets. Seal the overflow with a wet cloth and give firm, steady strokes.
3. Take off the trap. On sinks, a bucket under the U-bend and two slip nuts loosened by hand often reveal the clog.
4. Crank a hand snake. A quarter-inch drum snake reaches past the trap into the branch.
5. Stop there. If the clog survives all that, it is deeper than home tools go.

Mistakes to avoid

• Mixing two cleaners, which can release dangerous gas.
• Pouring them into a toilet, where the china can crack from the heat.
• Using them on old chrome, brass or galvanized traps that are already thin.
• Hiding that you used one when the plumber arrives. Tell us, so we can protect ourselves.

Where a plumber takes over

When plunging and a hand auger fail, or more than one drain is slow. See drain cleaning and bathroom drains.