What the inspector means
A leaking, poorly configured, loose, corroded, or improvised trap below a sink can leak into cabinetry/flooring and may not perform as intended.
Common causes
- Loose joints
- Corroded trap
- Improper configuration
- DIY alteration
What the repair usually looks like
Reconfigure or replace the trap/fittings, verify drainage, and check the surrounding cabinet/floor for moisture damage.
Who should handle it
Drain piping work should be handled by the appropriate plumbing trade. Finish repairs may follow if leakage caused damage.
Planning cost
$175-$500 for many accessible under-sink corrections, excluding larger drain or concealed damage.
Access, materials, hidden damage, minimum charges, permits, and existing conditions can change actual cost. Use this range for planning, not as a quote.
Common questions
Is this inspection finding urgent?
Address soon. A leaking, poorly configured, loose, corroded, or improvised trap below a sink can leak into cabinetry/flooring and may not perform as intended.
What repair is usually done?
Reconfigure or replace the trap/fittings, verify drainage, and check the surrounding cabinet/floor for moisture damage.
Who should handle the repair?
Drain piping work should be handled by the appropriate plumbing trade. Finish repairs may follow if leakage caused damage.