Sewer drainage for a new granny flat
The problem
A new granny flat needing all of its plumbing.
What we did
We've finished stage one: all the sewer drainage for the granny flat. The rest of the plumbing is still to come.



Mr. Clog Plumbing
The complete plumbing package for a new granny flat: sewer and stormwater drainage, hot and cold water, and gas, from the first trench to the final fit-off. For owners and builders.
No surprise bills: $0 call-out and a fixed price before any work starts.
Our guarantee: 12 months on our workmanship, in writing. What it covers
Mr. Clog has plumbed around 30 granny flats across Sydney. We do every stage of the plumbing: the sewer and stormwater drainage before the slab goes down, the hot and cold water and gas through the frame, and the fit-off at the end. We handle the applications needed and the inspections along the way. We work directly for owners, and as the plumber for builders.
Ready to book?
(02) 9139 8945 — available 24/7A granny flat is a small home, so it needs the same plumbing services as one.
Drainage from the kitchen, bathroom and laundry, laid in the ground and connected before the slab goes down.
The granny flat's roof water has to go somewhere. Downpipes are connected into stormwater drainage, kept separate from the sewer.
Water pipework to every tap and fixture, plus the hot water.
Gas pipework where the granny flat has gas appliances.
The drainage goes in first, because it sits under and through the slab. In Merrylands we have just finished this stage on a new granny flat: all the sewer drainage is in.
With the frame up, the water and gas pipework is run through the walls and floor before they are lined.
Once the walls, tiling and cabinetry are done, we come back and fit off the fixtures, taps and hot water.
If you are managing the build, we can do all the plumbing, so you have one plumber from the drainage to the fit-off.
We also work as the plumber for builders, doing each stage as the build reaches it.
From the Job Sheet
The problem
A new granny flat needing all of its plumbing.
What we did
We've finished stage one: all the sewer drainage for the granny flat. The rest of the plumbing is still to come.



How It Works
Sewer and stormwater drainage laid and connected before the slab is poured.
Hot and cold water and gas run through the frame before the walls are lined.
Fixtures, taps and hot water connected once the walls and cabinetry are in.
The applications needed and the inspections handled along the way.
Common Questions
Yes. Sewer and stormwater drainage, hot and cold water and gas, at every stage from the drainage before the slab to the final fit-off.
Around 30, across Sydney.
Both. We work directly for owners building a granny flat, and as the plumber for builders.
We do. We look after the applications needed for the plumbing and the inspections along the way.
Before the slab is poured. The sewer and stormwater drainage go in first, because they sit under and through the slab.
No. Stormwater and sewer are separate systems and must stay that way. The roof water goes to the stormwater drainage.
Absolute legend. Turned up on time, sorted the problem quickly and didn’t charge a fortune. Super easy to deal with and cleaned up after the job too. Will definitely be using him again and would happily recomme…
Excellent service from start to finish. Chris was professional, knowledgeable, and took the time to explain everything clearly before starting the job. He worked efficiently, kept the area clean, and made sure…
Turned up on time and honest service, couldn’t ask for much more.
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