Blocked Drains and Slow Drainage: What to Check First

A slow drain can be a local blockage, a poorly vented branch, an issue with falls or a restriction farther along the system. Repeated blockages deserve investigation rather than repeated chemical treatment.

Start with the affected fixtures

If only one basin or shower is slow, the problem may be local. If several fixtures are affected, inspect shared pipework and external drains.

Avoid creating a bigger problem

Aggressive chemicals can damage some materials and make later manual work less safe. Mechanical cleaning and inspection are often more informative.

Repeated issues need a cause

Grease, roots, collapsed pipes, poor gradients or construction debris can all cause recurrence.

When to call Finishline

If the work needs inspection, coordination, specialist trades or recurring follow-up, Finishline can turn the issue into a tracked request with visits, quotations and work history linked to the property.