Blocked Drain Cornubia
Find out if the block is on sewer, septic or stormwater so we can clear it and check the cause; a bio-cycle plant itself goes to your service agent.
Sewer or septic? Work out your system first
When a drain backs up on a Cornubia property, the fix depends on where that line ends: Logan’s sewer, a septic tank, a bio-cycle plant or, for roof and rain water, the stormwater system. This page is written for the owner making that call, with checks that fit a suburb of house lots, acreage and bush. Jim Monger Plumbing and Gas clears blocked lines with a jet rodder and electric eel, and uses a CCTV drain camera to look for what caused the block. Have the address and a description of what is backing up ready, and we can talk through which check comes first.
Three things shape the advice on a block here: what the wastewater runs into, how close the bush sits, and whether storm water in the yard is a blockage at all. Start with whichever one matches what you can see.
Only 13.0% of Cornubia’s occupied dwellings were rented at the 2021 Census, against 34.6% across Logan, so the reader is probably the owner making the decision. Separate houses made up 93.6% of dwellings, semi-detached homes and townhouses 5.9% and flats 0.4%, so this page speaks mainly to one household’s own pipes. If you own an attached home, check whether any line is shared, because census figures do not show who owns which pipe.
An owner’s first job in this suburb is to find out what the house drains into, because the answer varies. Council describes a relatively new urban subdivision, cut from an old timber, dairy and cropping property after a 1956 sale, and that history tells you nothing about your own pipes. Property listings show some acreage advertised with septic or bio-cycle systems, while a smaller lot on Beenleigh Redland Bay Road lists sewerage. Those listings are agents’ wording rather than a sewer map, so treat them as a prompt to check your own block, not a rule for your street. On an acreage block with a treatment plant, pull the service records before ringing about a blocked pipe, because Logan says aerobic plants need a licensed service agent every 3 months and aerobic sand filters every year. That agent may be the right first call for the plant itself, and we can look at the drain lines, septic tanks and trenches.
The bush changes the advice next: Cornubia Forest Nature Refuge, now reported at about 196 hectares, sits in the north-west of the suburb. It was declared in 2003 for its open forest, woodland and paperbark communities and its koala habitat, so that bush is staying. None of that proves leaves are blocking your drain, but if your block sits close to the refuge, your own downpipes and pits are the part you control, so check them for leaf and silt ahead of heavy rain.
Water pooling in a storm near California Creek needs a different first step, because Council’s flood study table names no study for that creek, which is not a finding about your land either way. With no creek report to point you to, pull a property report from the Logan Flood Portal. The portal lets you look up flood and overland flow mapping for your property. Council defines overland flow as run-off that exceeds the capacity of drains, pipes and channels in heavy rain, so clearing a drain may not stop that water. Send us what it shows and we can talk through a camera inspection, or a seepage trench or pump-out line.
What to check on your block, from leaf and silt to tank overflows
Toilet backing up on a tank or treatment plant
On a property that does not connect to the sewer, wastewater goes to an on-site system, so the fault may sit in the system rather than the house drain. Clearing a pipe may not help if the trouble is further along in the system, so check the service history as well as the line. We clear blocked drain lines and work on septic tanks and trenches. If you have a bio-cycle or other aerobic plant, ring your licensed service agent about the plant itself.
Overflow gully spilling in the yard
The overflow relief gully on a house drain is designed to release wastewater when there is a pipe blockage or a network overload. Council says not to cover it, plant trees or shrubs over or near it, or send downpipe or tank water into it, so keep it clear as the garden grows. We clear the line and use the camera to look for the cause.
Pits and downpipes choked with leaf and silt
Pits and downpipes need regular upkeep. As a general rule, a yard with trees nearby can wash leaf and silt into them. Logan makes owners responsible for stormwater on their property, including pipes, gutters, downpipes and gully pits, so a choked pit is yours to fix. We clear blocked lines, and we also install seepage trenches and pump-out lines where the water needs another way out.
Tank overflow soaking the yard
Acreage listings in Cornubia can also advertise rainwater tanks, and Council says tank overflows must connect to an approved stormwater system. The overflow must connect to an approved stormwater system. As a general observation, wet ground near a tank can have more than one cause and may look like a blocked drain, so check the tank along with the line. We offer rainwater tank services and stormwater drainage solutions, including seepage trenches and pump-out lines.
A roof water line nobody can trace
Council keeps no records of private roof water drainage for single houses, and most dwellings here are separate houses. Without a record, you may not know where the line runs, so a blockage can be hard to place from the yard alone. Council says a licensed plumber can locate on-site drainage pipes and draw a plan, and we offer CCTV drain camera inspections as well.
The same drain blocking again
As a general observation, clearing a line removes the block itself but not always the reason it formed, such as roots or a damaged section, so it may build up again. The age of a drain cannot be guessed from the suburb, so a repeat block needs a look at that line in that house. We clear the line and put the CCTV camera down it to look for the cause, rather than assuming one.
Our blocked drain services in Cornubia
Blocked drain clearing
Blocked lines cleared with a jet rodder and electric eel. If the line runs to a tank or treatment plant rather than sewer, tell us when you ring, so we start at the right end of the system.
CCTV drain camera inspections
A drain camera shows the inside of the line, so the cause can be looked for and not guessed.
Septic system services
Work on septic tanks and trenches. Some acreage properties here are advertised with septic systems. If you hold a past service report, have it to hand when you call, as it may show what has already been looked at.
Stormwater drainage solutions
Stormwater drainage, including seepage trenches and pump-out lines. Have your Flood Portal result ready, since a new trench or pump-out line answers a different problem from a pit choked with leaves.
Who you are calling
Jim Monger Plumbing and Gas is a family-run plumber and gasfitter based at Victoria Point, serving Redlands, Logan and south-east Brisbane, with Cornubia on its service-area list. The business holds QBCC plumbing licence 15504687 and gas licence L90908, and home owners can look up a plumber’s licence on QBCC’s online registers. Quotes are free. As of 28 October 2026 the business had a Google rating of 4.9 from 100 reviews. One Google reviewer wrote that the team "fixed our blocked drain in no time". Another used the business twice for outside drainage jobs and said they showed up on time on the day promised. A third had a clogged, smelly drain diagnosed and resolved within the hour, which is one customer’s experience and not a time promise. These reviews speak to the business in general rather than to any one suburb.
Ring with the address and what is backing up, and tell us if you know whether the property is on sewer, a septic tank or a bio-cycle system. If you are not sure, say so and we will start there. Calls are taken 24/7, including weekends, for overflowing drains.
Frequently asked questions
Can’t see your question? Call us and we’ll talk it through.
Call 0418 871 269How do I tell if my Cornubia home is on sewer or septic?
Start with the as-constructed plans Council offers online, where they are available for your property. A treatment plant in the yard or a service report from an agent points to an on-site system. If you still cannot tell, Council says a licensed plumber can locate on-site drainage pipes and draw a plan where none exists, so ring us and we can talk it through.
Should I ring Logan Water or a plumber first?
On a sewered property, Council’s responsibility ends at the first inspection opening of the property connection, and blockages in the house drains upstream of it are the owner’s. If you think it is on your side, Logan Water asks you to engage a private contractor first, and if you are unsure it will visit and advise which side the block is on. On a septic or bio-cycle system with no sewer connection, start with your service agent or a plumber.
Can my septic pump-out go to the Loganholme plant?
Council’s notice says the Loganholme plant no longer accepts domestic sewage or home septic pump-outs because of site safety concerns, and it lists other disposal sites. Before you book, ask the contractor where the waste will go.
Does living near the nature refuge mean my drains will block more often?
Being close to the refuge tells you nothing certain about your own pipes. A camera inspection shows what is actually in the line, and our guide to tree roots explains what roots can do if that is what turns up.
I rent out a Cornubia home. Who has to approve the drain work?
Logan Water’s own rule is that it will not clear a house drain at a rented property without approval from the owner or agent, unless there is an urgent health risk. Where Logan Water does the work, a standard fee applies, payable within 14 days. That rule covers Logan Water’s work only. For a private plumber, it is simply practical to tell your tenant or agent ahead of time who can say yes to a job.
Sewage has come up inside. What do I do right now?
Logan City Council’s advice during a sewage overflow is not to touch raw sewage with bare hands, to keep children and pets away, and not to flush until the cause is fixed. Council also says to notify Logan Water, your insurer and any property manager or landlord. We take calls for overflowing drains around the clock.
Blocked drains in nearby areas
Not listed? We probably still cover your area, so give us a call.
Related services
More ways we can help around your home or business.
Guides
What to check yourself first, and when it needs a plumber. All guides
Tell us the address and what is backing up. Call 0418 871 269.
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