Home›Services›Drain Smoke Testing

Reviewed and updated July 2026

💡 Quick answer: Drain smoke testing pushes safe, non-toxic smoke through your drainage system to reveal exactly where sewer smells escape — cracked pipes, dry or missing traps, unsealed vents — including places a camera can’t reach. The smoke is odourless, non-staining and safe for occupied homes. Call 0425 226 636.
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Finds Smells Fast
The escape point, pinpointed
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Non-Toxic Smoke
Purpose-made, dissipates in minutes
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Home-Safe
No need to move out
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Findings Report
Written down, not hand-waved

Drain Smoke Testing — Find the Smell at the Source

Mystery sewer smells, illegal cross-connections, breached stack vents and unseen pipe defects are exactly what drain smoke testing is built to expose. Water Serpent Plumbing uses non-toxic, odourless professional smoke machines to pressurise your sewer or stormwater system and show — visually — exactly where it is leaking, venting or cross-connected.

👃 What Smoke Testing Solves

Symptom What the smoke usually finds
🚽 Sewer smell in one bathroomA dry floor-waste trap or unsealed pan collar
🌧️ Smells after heavy rainA cracked pipe or vent letting gas escape under pressure
🏠 Whole-house odour that comes and goesA failed vent or hidden pipe defect in walls or subfloor
🐜 Pests appearing near drainsOpenings into the drainage system — smoke shows every gap

Smoke testing is invaluable for owners corporations, real estate vendors, councils and homeowners chasing problems that CCTV alone cannot solve.

Common Warning Signs

👃 Persistent sewer smell with no visible cause

A cracked stack, missing trap or breached vent is leaking sewer gas.

🌧️ Stormwater cross-connected to sewer

A major compliance issue often hidden under decades of renovations.

🏢 Owners-corp odour complaints

Multi-storey buildings need smoke testing to isolate the failing unit.

🚫 Suspected unauthorised connections

Pool overflows, downpipes or laundry tubs incorrectly connected to sewer.

🏡 Pre-purchase peace of mind

Pair with CCTV for a complete picture of drainage health.

Our Diagnostic & Repair Process

1️⃣ System isolation

We cap any open vents that should not see smoke and identify the entry inspection point.

2️⃣ Smoke introduction

Professional electric smoke generators pressurise the system with safe, non-toxic vapour.

3️⃣ Visual survey

We walk the property and roof line documenting every point where smoke emerges, photographing each finding.

4️⃣ Report & recommendations

A written report shows each defect, its location and our recommended repair approach.

Need a Drain Smoke Testing Specialist?

Call Jack directly for same-day service across Melbourne's South East. Free over-the-phone diagnosis available.

📞 Call Jack — 0425 226 636

Equipment We Use

🌫️ Professional electric smoke machines

Safe for occupied buildings, fully odourless and non-irritant.

🎈 Inflatable plugs

To isolate sections of the system for targeted testing.

🌡️ Thermal & visual cameras

Pick up faint emissions in poorly lit or external locations.

Frequently Asked Questions — Drain Smoke Testing

Yes — we carry out non-toxic drain smoke testing across Melbourne's outer east, the Dandenong Ranges and the Yarra Valley to track down mystery sewer smells. Call Jack direct on 0425 226 636.

Yes. We use a non-toxic, food-grade smoke that is purpose-made for this job — odourless, non-staining, leaves no residue, and it dissipates within minutes. The home can be occupied during testing, so you can stay home while we test.

A residential test usually takes 1–2 hours including setup and reporting. Multi-unit buildings can take a full day.

No. The system is gently pressurised and there is no risk of damage to fittings, paintwork or carpets.

CCTV sees the inside of pipework. Smoke testing reveals everything the system is connected to and any leaks above ground — the two are complementary, not alternatives.

Smoke testing is quoted per job — the price depends on the size of the property, the number of stacks and vents, and whether sections of the system need to be isolated for targeted testing. Jack gives you a fixed upfront quote over the phone before any work starts, so there are no hourly surprises. For how drain pricing works generally, see our blocked drain cost guide for Melbourne.

Because smells and blockages are different problems. Sewer gas escapes through dried-out traps, cracked pipes or failed vents even when everything drains perfectly. Smoke testing finds the escape point without pulling apart walls chasing it.

Drain Smoke Testing in Your Suburb?

We service Ringwood, Bayswater, Croydon, Ferntree Gully, Boronia, Wantirna, Kilsyth, Mooroolbark, Glen Waverley, Lilydale and surrounding eastern and outer-eastern Melbourne suburbs.

📍 Lilydale 📍 Mooroolbark 📍 Ferntree Gully 📍 Croydon 📍 Kilsyth 📍 Boronia 📍 Ringwood 📍 Belgrave 📍 Mount Evelyn 📍 All suburbs →

Book your drain smoke testing job today

Eliminate mystery sewer smells once and for all — book a professional smoke test with a written report and full photographic evidence.

📞 Call Jack — 0425 226 636