Water Leaking from Aircon Pipe?

If you notice water dripping from your aircon’s drainage pipe, trunking, or wall outlet — or worse, inside the home along the pipe path — it’s not just “humidity.” It’s a sign something in the drainage, insulation, or pipe structure has failed. Here’s what causes it — and what needs to be checked.

Common Reasons Aircon Pipes Leak

1. Clogged drainage line

If algae, debris, or dust block the pipe, water has nowhere to go. It backs up — often leaking from pipe joints or trunking seams.

2. Incorrect slope

If the drainage pipe isn’t angled properly during installation, gravity can't do its job. Water stagnates, then leaks from connection points.

3. Loose joints or poorly sealed trunking

Over time, vibration or heat can loosen fittings. Water escapes not at the source — but further down the pipe route.

4. Frozen coil thawing

If the evaporator coil ices up (from low gas or airflow issues), the thaw can overwhelm the pipe's capacity — especially if the drainage isn’t clear.

5. Condensate pump failure

For ceiling units or long drainage runs, a faulty pump means water can’t be lifted out — leading to overflow at the lowest pipe point.

6. External insulation breakdown

If cold pipes aren’t properly insulated, condensation can form on the outside of the pipe — dripping like a leak.

7. Pipe cracked or degraded

Over time, PVC or flexible piping can crack due to age, heat, or chemical exposure. The leak may be small — but constant.

What You Can Check First

• Is water dripping near the unit — or far from it?

• Drain pipe outside dripping steadily?

• Any visible trunking bulge or damp patch?

• Does the leak get worse during heavy use?

If water is leaking along the pipe route — not just the indoor unit — it likely points to slope, blockage, or connection failure.

Why It Matters

Pipe leaks often go unnoticed until damage appears somewhere unexpected.

If ignored:

• Water can seep into walls, ceilings, and wiring

• Paint, plaster, or electrical damage may follow

• Trunking may need full replacement

• Root cause (like coil freeze or pump failure) may escalate

A leaking pipe is often a secondary symptom. The real issue may lie upstream.

When to Book a Diagnostic

✅ Leak seen at pipe, trunking, or wall outlet

✅ Drainage outside is weak or absent

✅ Ceiling or floor shows water damage from above

✅ Already serviced unit but leak persists

We’ll trace the leak source — check pipe slope, trunking joins, drainage path, and insulation — and fix what’s actually failing.