Wood Fireplace Installation in Mulgrave: Flue Through Existing Chimney
Wood fireplace installation Mulgrave case study — new wood heater into existing chimney, flue liner, hearth pad, compliance. Prime Plumbing…
What Is Drain Jetting? A Plumber's Guide for Melbourne Homeowners
What Is Drain Jetting? A Plumber's Guide for Melbourne Homeowners, a Prime Plumbing & Gasfitting plain-English guide to what is drain jetting for Melbourne homeowners. Below we cover what works, what doesn't, and when to call a licensed plumber.
Quick answer: Drain jetting (also called hydro-jetting) is the use of a high-pressure water jet, typically 2,500-4,000 PSI through a specialised nozzle, to clear blocked drains and clean the inside of the pipe. Unlike a mechanical snake, which bores a hole through a blockage, jetting scours the pipe walls, removing fat, grease, scale, soap, hair build-up, and small tree roots. It's the right tool for recurring blockages, kitchen-line grease, and root-prone older pipework. It's not the right tool for collapsed pipes, severe structural damage, or large root masses, those need excavation or relining (Prime doesn't do relining; we'd refer you on for that). Jetting in Melbourne typically costs $300-$700 depending on access, equipment size, and whether a CCTV inspection is included.
What drain jetting actually is
A drain jetter is a high-pressure water pump fed through a long flexible hose to a specialised nozzle. The nozzle has small forward-and-rear-facing jets, the rear jets propel the hose forward through the pipe, and the forward (or rotating) jets do the cutting and scouring work.
Pressure ratings vary by job size:
- Small portable jetter: 1,500-2,500 PSI, suitable for sink lines, basins, laundry tubs, and short runs of 50-80mm pipe
- Mid-size trailer-mounted jetter: 3,000-4,000 PSI, suitable for residential sewer lines, 100-150mm pipe
- Truck-mounted jetter: 4,000+ PSI with high water volume, used for council mains, large commercial lines, and heavily compromised residential lines
Most Melbourne residential blockages are handled by a portable or mid-trailer unit. Truck-mount work is rarer for individual homes, usually only when the line is unusually long or the blockage is at council-side depth.
What jetting can clear
The reason jetting earned its place over snake-only work is that it cleans the whole pipe surface, not just a path through the middle. So it handles:
- Fat, oil, grease (FOG) built up on kitchen-line walls, the most common cause of recurring kitchen blockages in Melbourne homes
- Soap and hair in bathroom and laundry lines
- Scale and mineral build-up on the inside of older clay or galvanised iron lines
- Small tree roots that have entered through joints, the jet shears them off the pipe wall
- Loose sediment, gravel, and debris carried in by stormwater
- Wet wipes, "flushable" wipes, sanitary product accumulations: these tangle on snake heads but the jet breaks them up and flushes them out
Importantly, after a jet pass the pipe is clean, not just unblocked. That matters because a blockage cleared by a snake often re-forms in weeks, the underlying grease coating is still there, just with a hole through it. A jetted pipe usually stays clear for 18 months to several years depending on what's going down it.
What jetting can't fix
Jetting is the wrong tool for some problems, and an honest plumber will tell you so before ramping up:
- Collapsed pipe: the pipe has structurally failed. Jetting through a collapse risks pushing material further or worsening the failure. The fix is excavation and replacement.
- Significant root mass that's penetrated the pipe wall: small roots get cut, but a fist-sized intrusion needs mechanical cutting (specialised root-cutter) and often follow-up relining. Prime doesn't offer relining, so we'd CCTV-inspect, document, and refer you on.
- Off-grade or back-fall pipe: water pooling because the pipe slope is wrong. Jetting clears the standing material but doesn't fix the underlying gradient. That needs excavation.
- Cast iron or galvanised pipe at end of life: these can be brittle. High-pressure jetting can perforate already-thinned walls. CCTV first, then decide.
- Joint displacement / cracked pipe: jetting may temporarily clear material but the underlying defect will keep catching. A long-term fix needs excavation.
This is why a CCTV inspection is often paired with jetting, the camera shows what's actually there, and the plumber can quote the right work rather than guessing.
How jetting compares to a mechanical snake
A mechanical drain snake (also called a drain machine or eel) is a rotating cable with a cutting head on the end. It's fed down the pipe, and as it spins it bores through the blockage. Snakes are good for:
- Single, defined blockages (one toilet blocked, one basin slow)
- Hair and small soft material in short runs
- Diagnostic work, sometimes you snake first to confirm the line clears, then decide whether jetting is needed
But a snake leaves the pipe walls coated with whatever was there. If you've got grease, scale, or root build-up, a snake bores a tunnel through it but the layer remains, ready to re-trap the next thing that comes down the line.
The honest rule of thumb most Melbourne plumbers use:
- First-time blockage in a new pipe snake
- Recurring blockage, kitchen-line grease, or roots jet
- Slow drainage with no acute blockage CCTV first, then jet if appropriate
- Suspected structural issue CCTV first, decide from the footage
Service area
Prime Plumbing & Gasfitting jets and inspects drains across Melbourne's eastern, south-eastern, inner-east, and bayside suburbs. See all suburbs we service
Book a drain jetting visit
Call 0475 407 670 or send through the contact form. Tell us where the blockage is, how often it's happened, and whether you've had a previous CCTV inspection, we'll bring the right equipment first time.
- BPC #103414: Plumbing Industry Commission licensed
- Type A Gasfitter: registered with Energy Safe Victoria
- CCTV inspection included on most jetting jobs by request
- 4.8 stars on Google
When you should book drain jetting
The signs that jetting (rather than snaking) is the right call:
- Same drain blocks repeatedly: every few months, you're back where you started
- Multiple drains slow at once: suggests build-up in the main line, not a single fixture issue
- Gurgling toilet when running washing machine: main line restriction
- Smell from drains: bacterial growth in pipe-wall biofilm, jetting clears it
- Kitchen line specifically: grease accumulates faster than any other line in the house, jetting is the right maintenance interval (every 18-36 months depending on cooking style)
- Older Melbourne home with mature trees: root intrusion through clay-pipe joints is common, jetting handles small roots and the camera shows whether bigger work is needed
For commercial properties, cafés, restaurants, takeaways, jetting is the standard maintenance tool, not an emergency call. Most Melbourne kitchens running grease traps schedule jetting every 6-12 months as preventive maintenance.
What to expect during a jetting visit
A typical Melbourne residential jetting job:
- Site assessment: locate the clean-out, check access, confirm the right equipment for the run
- Pre-jet CCTV inspection (recommended), confirms what's there, checks for collapses or major defects before jetting
- Jetting pass: hose fed in, jet activated, slowly pulled back through the line. Repeated as needed for tough sections
- Post-jet CCTV (recommended), confirms the line is actually clean, documents the result
- Written report: what was done, what was found, recommendations for further work if any
- Cleanup: the clean-out is rinsed and resealed
Total time on site: typically 1.5-3 hours for a residential line, longer for difficult access or commercial work.
You can use water in the building during the jet, but it's worth holding off on heavy use (washing machine, dishwasher) until the plumber confirms the line is clear.
When to call a licensed plumber
Jetting needs licensed work because the pressures involved are dangerous, and the diagnostic decisions (jet vs snake vs excavation) have real cost consequences:
The Victorian Building Authority maintains a plumbing licence search: verify any plumber before booking.
Frequently asked questions
It depends on the pipe condition. Modern PVC and properly-installed clay pipe handles jetting at residential pressures without issue. Old cast iron, galvanised iron, or thin-walled clay can be marginal, the jet pressure can sometimes worsen pre-existing damage. That's why a pre-jet CCTV inspection matters: the plumber sees what they're working with before they pressurise the line. On genuinely fragile pipework we'd jet at lower pressures or recommend a different approach.
Most Melbourne homes don't need scheduled maintenance jetting, only reactive jetting when a blockage develops. The exceptions are kitchen lines (every 18-36 months if you cook a lot of fatty food), and properties with mature trees over the sewer easement (annual or biennial jetting prevents root build-up from becoming a major job). Commercial kitchens are different, they typically schedule jetting every 6-12 months.
Properly done on appropriate pipework, no. The water pressure feels intimidating but it's calibrated for pipe cleaning, not pipe destruction. The risk is jetting fragile or already-damaged pipe, which is why a CCTV first is good practice. We'd never jet a pipe we hadn't inspected if there was any doubt about its condition.
Hire-yard jetters do exist, but the small portable units sold for DIY are limited in pressure and reach, and the technique matters. Misuse can damage pipe joints or push material further down rather than clearing it. For a household that gets one blockage every few years, hiring a licensed plumber makes more sense than buying or renting equipment. If you're a property manager or business owner with recurring drain issues, the calculus changes.
Depends entirely on what's going down the drain. A jetted kitchen line in a household that pours fat into the sink and uses a lot of butter will block again in months. A jetted line in a household that scrapes plates and runs hot water after dishwashing might stay clear for 3-5 years. After jetting, what you put down the drain determines how long the result holds.
Yes, they're the same process, different terminology. "Hydro-jetting" is more common in North American plumbing, "drain jetting" is the common Australian term. Both refer to high-pressure water cleaning of drains.
No. Jetting is a non-excavation method, the hose feeds in through an existing access point (clean-out, gully, or roof vent in some cases). That's a major part of why jetting is preferred over excavation when the pipe is structurally sound: you get the result without breaking up paths or driveways.
Before You Book
A quick checklist to share with your plumber when you book:
- When did the issue start?
- Is it isolated to one fixture or multiple areas?
- Are there any visible leaks, smells or unusual sounds?
- Have you turned off the relevant isolation valve?
- Drain jetting Melbourne: high-pressure jetting for residential and commercial drains
- CCTV drain inspection Melbourne: pre-jet and diagnostic camera surveys
- Blocked drain repairs Melbourne: broader blocked-drain service including jetting and snake work
