Troubleshooting • Dec 15, 2025 • 8 min read

How to fix a slow drain safely (renter edition)

Slow drains are usually hair + soap scum (tub) or grease + food (kitchen). The goal is to try low-risk steps first and avoid causing damage.

Michael Rivera

Property maintenance specialist with 12+ years helping renters handle everyday fixes.

Important: These guides focus on low-risk, reversible steps. If your lease forbids a modification (or the task involves gas/electrical/structural work), stop and contact maintenance.

Under-sink plumbing showing P-trap and drain connections — The P-trap (curved pipe) is where most clogs form. Notice the flexible dishwasher hose connected to the disposal.

What to avoid (common renter mistakes)

Mixing chemicals (dangerous fumes).
Overusing harsh drain cleaners (can damage pipes and finishes).
Forcing a cable/snake aggressively (can scratch or dislodge parts).

Safe step-by-step checklist

Remove the stopper/strainer and clean visible gunk.
Use a plastic hair tool for tubs/showers (cheap and effective).
Hot water flush (not boiling on fragile fixtures): run hot tap water for 2–3 minutes.
Dish soap + hot water for kitchen sinks (helps with grease).
Plunger (cover overflow if present; use short firm plunges).

"Stop here" signs (call maintenance)

Water backs up into another drain (possible main-line issue).
Gurgling + sewer smell.
Repeated clogs within days.
Any leak under the sink after attempts.

Related: Monthly maintenance checklist