What is an inspection opening on a drain?

An inspection opening is a capped fitting built into a drain line that gives direct access to the pipe. Unscrew the cap and a plumber can feed a jetter or CCTV camera straight in. Most newer drainage has them at set points. Many older buildings either never had them or have had them buried under paving or gardens.

Why can't a plumber just jet the drain from a toilet?

Sometimes they can, but it means going through the toilet pan and bends that a jetter hose and camera don't travel through well, and it risks damage to the fixture. Jetting from a toilet also pushes you in one direction only. A proper inspection opening on the main line gives a straight, clean path both ways.

Who pays for drain repairs in a strata building?

Drains that serve more than one lot, or sit under common areas like a shared courtyard, are generally common property, and the owners corporation is responsible for maintaining them. Pipes that serve only one unit can be the lot owner's responsibility. Check the strata plan and by-laws, and ask the strata manager if it is unclear.

Will an inspection opening stop my drain from blocking?

No. It doesn't stop roots or build-up, but it makes clearing them much simpler. With a fixed opening the drain can be jetted and checked on camera without digging each time. If the camera shows the pipe is badly cracked or root-damaged, that is when relining or a repair becomes the next conversation.

Does cutting in an inspection opening mean digging up the whole courtyard?

No. Only the section over the pipe needs to be opened, usually a few pavers or a small square of concrete. The rest of the area stays untouched. In our experience it is worth placing the opening where the pavers can be lifted easily next time.

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Case study · 5 min read

Strata inspection opening, Bellevue Hill

An old clay sewer line at a Bellevue Hill strata block had no inspection opening. Greg cut one in so the drain could be jetted, now and every time after.

Adam Norton · 5 November 2026

Greg from Norton Plumbing working in an opened drain under lifted pavers in a Bellevue Hill strata courtyard garden, with a drain jetter reel and CCTV camera set up beside him

The shared sewer line at this Bellevue Hill strata block kept blocking, and every time it did there was the same problem: nowhere to get into it. The drain ran under a paved courtyard garden, and there was no inspection opening anywhere along the line to feed a jetter or drain camera through.

So the job was not just clearing the drain. It was giving the building a proper way in, so this blockage and every one after it could be jetted from a fixed point instead of guessed at.

Why a drain with no inspection opening is hard to clear

An inspection opening is a capped fitting on a drain that lets a plumber put a jetter or camera straight into the pipe. Modern drainage has them built in at set points. Many older Eastern Suburbs buildings were plumbed before that was routine, and the openings that did exist have often been buried under paving or garden beds over the decades.

Without one, the options are poor. You can try to reach the blockage from a toilet or a gully, which usually means going the wrong way through bends, or you can dig. Digging once to fit a permanent opening is the better of the two, because it only has to happen once.

Cutting in the inspection opening

Greg lifted the courtyard pavers over the line and dug down to the pipe. It was the original earthenware clay sewer, and tree roots from the garden were matted through the soil all around it.

Greg from Norton Plumbing cutting out a section of old clay sewer pipe under lifted pavers in a Bellevue Hill strata courtyard, with a new PVC inspection junction ready beside him — Greg cutting out a section of the old clay pipe. The new PVC junction with its screw cap is sitting on the pavers, ready to go in.

He cut out a short section of the clay pipe and fitted a new PVC junction in its place, with a screw-cap inspection opening pointing up towards the surface. Clay and PVC are different sizes on the outside, so the new fitting is joined to the old pipe either side with flexible PVC-to-earthenware couplings, clamped with stainless steel bands.

A new white PVC inspection opening junction joined to an old earthenware clay sewer pipe with black flexible couplings, surrounded by tree roots in the soil, at a Bellevue Hill strata building — The new junction in place. The blue is primer on the PVC joint, and the black rubber couplings join it to the original clay pipe either side. Note the roots through the soil around it.

Jetting the strata drain from the new opening

With a fixed way in, Greg set up the high-pressure jetter and ran it through the line from the new opening. A jetter sends water through the pipe at high pressure, scouring the full bore and flushing roots and debris out to the sewer main, rather than just punching a hole through the blockage. He then ran the CCTV camera through to check the line on screen.

Greg from Norton Plumbing tightening the clamp on a new PVC inspection junction in an opened sewer line under lifted courtyard pavers in Bellevue Hill — Greg tightening the coupling clamps on the new junction before the line was jetted and checked on camera.

The pavers went back down over the top. The cap sits just beneath them, so the next time the line needs a clean, it is a matter of lifting a paver rather than digging.

Why Bellevue Hill strata drains block

Bellevue Hill has a lot of older red-brick and Art Deco apartment blocks set in established gardens. That combination is hard on drains. The original sewer lines are usually earthenware clay laid in short lengths, so there is a joint every metre or so, and each joint is a place roots can find moisture and push in. Mature trees and garden beds sit right over the lines in many courtyards.

In a strata building the shared drain also carries several units' worth of waste. A partial blockage that one household would barely notice shows up fast when four or six apartments are all draining into it. Shared drains on common property are generally the owners corporation's responsibility to maintain, which is why an access point that makes every future clean simpler is worth it for the whole building. The NSW Government sets out who is responsible for what in its guide to strata repairs and maintenance.

Signs your building's drain needs an access point

The same drain keeps blocking. Repeat blockages usually mean roots at a joint, which a jetter can clear but only if it can get in.
The last plumber had to come in through a toilet or gully. That is a sign there is no proper inspection opening on the line.
Ground-floor units back up first. The lowest fixtures on a shared drain are where a blockage shows up.
Gurgling in several apartments at once. Air being pushed back up through more than one unit points to the shared line, not one unit's pipes.
Nobody knows where the drain runs. If the strata plan and the building manager can't say, it is worth having it located with a camera while it is being cleared.

How to reach Norton Plumbing

Norton Plumbing has worked in Bellevue Hill and across the Eastern Suburbs since 2019, clearing sewer and stormwater drains, drain jetting, CCTV inspections and pipe relining for strata buildings and homes. I hold NSW plumbing licence 397768C. The team works out of 10/11a-15 Berwick St, Coogee. If your building's drain keeps blocking, see our blocked drains page, our Coogee strata waste stack case study, our Bellevue Hill plumber page, or call 0477 858 951. Quotes are free across the Eastern Suburbs.

Frequently asked

Common questions

What is an inspection opening on a drain?: An inspection opening is a capped fitting built into a drain line that gives direct access to the pipe. Unscrew the cap and a plumber can feed a jetter or CCTV camera straight in. Most newer drainage has them at set points. Many older buildings either never had them or have had them buried under paving or gardens.
Why can't a plumber just jet the drain from a toilet?: Sometimes they can, but it means going through the toilet pan and bends that a jetter hose and camera don't travel through well, and it risks damage to the fixture. Jetting from a toilet also pushes you in one direction only. A proper inspection opening on the main line gives a straight, clean path both ways.
Who pays for drain repairs in a strata building?: Drains that serve more than one lot, or sit under common areas like a shared courtyard, are generally common property, and the owners corporation is responsible for maintaining them. Pipes that serve only one unit can be the lot owner's responsibility. Check the strata plan and by-laws, and ask the strata manager if it is unclear.
Will an inspection opening stop my drain from blocking?: No. It doesn't stop roots or build-up, but it makes clearing them much simpler. With a fixed opening the drain can be jetted and checked on camera without digging each time. If the camera shows the pipe is badly cracked or root-damaged, that is when relining or a repair becomes the next conversation.
Does cutting in an inspection opening mean digging up the whole courtyard?: No. Only the section over the pipe needs to be opened, usually a few pavers or a small square of concrete. The rest of the area stays untouched. In our experience it is worth placing the opening where the pavers can be lifted easily next time.

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