Air Conditioning Condensate and Termite Risk

A dripping air conditioner pipe doesn't look like much of a problem. It's one of the most common conducive conditions I find on inspections, and it's usually a five-minute fix once someone points it out.

What's actually happening

Split-system air conditioners produce condensate, water pulled out of the air as the unit cools it, and that water has to go somewhere. It runs out through a small pipe, usually to the nearest wall or down toward the ground. On plenty of homes, that pipe just hangs there, dripping in the same spot against the wall or the ground every time the system runs.

On one job I inspected, the outdoor unit's condensate pipe was hanging right next to the house, dripping steadily against the wall. The hot-water system's excess pipe on the same property had the identical issue, water running out and landing against the structure instead of somewhere it could drain away safely. Both got the same fix: I clipped a hose onto each pipe and ran it out into the garden, well clear of the house, so the water drains away instead of soaking one spot against the wall day after day.

Why this matters for termites

Moisture is the single biggest factor drawing termites toward a structure. A condensate or excess pipe dripping constantly against a wall creates exactly the damp, reliable moisture source that softened timber and consistent conducive conditions come from. It's not a one-off event like a storm. It's a small amount of water landing in the same spot, day after day, for as long as the system's been running unaddressed.

That kind of steady, low-level moisture is different to a leak you'd notice straight away. Nobody's rushing to fix a slow drip that's just running into the garden bed or against the base of a wall, which is exactly why it can sit there for years, quietly keeping one spot of the property damp.

What to check around your own home

Where does the pipe actually go? Follow the condensate line from your outdoor unit and see where the water comes out. If it's landing against a wall, a slab edge, or pooling near the foundation, that's worth redirecting.

Hot water system excess pipes. The same issue turns up on hot water systems, which also have a pipe for excess water or pressure relief. Check where that one drains too.

Is the ground sloping the right way? Water should drain away from the structure, not toward it. If the finished ground level near a wall slopes back toward the house, that's a separate but related risk worth addressing.

The fix is usually simple

In most cases, redirecting a condensate or excess pipe is as straightforward as running a length of hose from the pipe outlet to a garden bed or drainage point well clear of the structure. It's not a specialist repair, and it's one of the more satisfying recommendations to give, since it's cheap, quick, and removes a genuine conducive condition rather than just noting it and moving on.

Common questions

Is a dripping air conditioner pipe definitely going to cause termites?
Not on its own, no single conducive condition guarantees termites will find a property. What it does is create one of the conditions termites actively seek out, so removing it reduces risk rather than eliminating a specific guaranteed outcome.

How do I know if my condensate pipe is causing a problem?
Look at where it drains. If there's a damp patch, moss, or discolouration on a wall or the ground directly under the outlet, that's a sign it's been running there for a while.

Can I fix this myself?
Often yes. Redirecting the pipe with an extension hose to a garden bed away from the structure is something most homeowners can do themselves. If you're not sure where the safest drainage point is, I'll flag it during an inspection.

Does this apply to ducted systems too?
Ducted systems also produce condensate and usually drain via a dedicated line, sometimes to a stormwater connection. The same principle applies, know where it goes and make sure it's not landing against the structure.

Get the whole property checked

Call 0405 790 927 to book a termite and timber-pest inspection. I'll check condensate pipes, drainage, and every other conducive condition on the property, and hand you the written report on-site before I leave.