Blocked drain: the right reflexes before the plumber arrives

Gauge the scale of the blockage

A single slow-draining sink usually means a localised blockage. If several outlets are affected at once (shower, toilet, sink), the problem is deeper in the stack, which needs professional equipment.

Useful actions

Boiling water (not in toilets or fragile PVC), a good plunger, or removing the trap to clear accumulated debris can be enough for a light blockage. Shut off the water if an outlet overflows.

Mistakes to avoid

Avoid aggressive chemical drain cleaners: they damage pipes, are dangerous and complicate the plumber's work. Do not force a metal hanger that can scratch or pierce the pipes.

When to call a professional

If the blockage persists, recurs regularly or affects several outlets, an electric drain snake or water jetting is required. This method removes the blockage for good without damaging your installation.

Frequently asked questions

FAQ