Blocked Drain Underwood

A blocked drain in Underwood can be harder to place than it looks, because plenty of property records show no drainage plan online and the stormwater pipes nearby were laid decades apart. Jim Monger Plumbing and Gas clears blocked drains with a jet rodder or electric eel, and inspects lines with a CCTV drain camera to look for the cause. Our base is at Victoria Point, and Underwood is in our service area for homeowners, landlords and property managers. Below is what to check on your own block first, and how to tell which pipe may be yours. If water is rising now, skip the reading and ring, because emergency calls are taken 24/7.

Sewage at the overflow gully points to the sewer side: your own house drain or Council’s sewer. A backed-up downpipe or yard drain points to stormwater, either a private line or Council’s network. What you do next depends on which it is, and in this suburb, records alone may not settle that.

Underwood had the lowest share of five Logan suburbs compared for house drainage plans online: as of 4 November 2026 about half of its property records had one, against about 73% in Rochedale South. The gap runs street by street, with 7 of 42 records on The Heights showing a plan, but 52 of 63 on Louise Street. So if no plan turns up for your property, you could ask about a CCTV drain camera inspection before anyone digs; we offer them.

Streets in the same suburb can sit on very different stormwater pipe: Council’s data dates Ferguson Street’s drains to the 1970s, Springvale Circuit’s mostly to the 1990s and Elisa Avenue’s to the 2010s. About 58% of the mapped length dates from 2000 or later, against 14% to 23% in four neighbouring suburbs, so do not assume this network is old because next door’s is. Those dates describe street stormwater, not your house drain or your home’s age, so first check which pipe your yard pit or downpipe feeds.

More of that mapped pipe is privately owned too: about 26%, against 8% to 16% in the same four suburbs, with the longest private runs on Springvale Circuit, Lexington Road and Brookvale Drive. So before you ring Council about a failing stormwater pipe, confirm who owns that section, and in a townhouse, check with any body corporate as well.

About a third of the suburb is mapped as the Runcorn soil landscape, dark clays of a type the Queensland Government describes as cracking open when dry, including many Brookvale Drive and Fairmont Crescent addresses. The mapping is broad and fill may have changed your block, so it is a reason to check, not a diagnosis. If a drain on that clay keeps blocking, have the line looked at with a camera rather than assume household waste; we offer CCTV drain camera inspections.

Logan’s planning scheme maps about 18% of the suburb as flood risk area, and about 2.5 km of Slacks Creek runs through the south, so pooling after heavy rain in parts of Underwood may be a creek or overland flow issue rather than a blocked pipe. The north end differs: state mapping puts about 9% of the suburb in the Brisbane basin, so do not assume a property there drains to Slacks Creek. Before paying to clear a drain that only backs up in storms, look up your address on Council’s free Flood Portal, which may not show every local flood.