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Why do I need a Sewer Service Diagram?

A Sewer Service Diagram, drainage diagram or “helio” (for plumbers over 30 years old) is a map that shows where the sewer pipes run throughout your home, or commercial property.

This sewer drainage diagram is available from Sydney Water, the Water authority in your capital city, a reputable plumber’s supplier or your local Council, depending on where you are in Australia!

In NSW a sewer drainage diagram is a normal inclusion in a “Contract of Sale” for your home.

The sewer diagram shows a line diagram  of your property, including the boundaries of the property with the outline of the dwelling and associated buildings, with all plumbing or sanitary fixtures shown.

Whenever the sanitary or sewer drainage on a property is either modified or added to by a licensed plumber or drainer, the local water authority is booked to inspect the work and modify any existing drainage plans and upgrade the sewer diagrams of each individual property.

The sewer diagram will show if your sewer pipeline runs through other properties, if it is connected to a common sewer with multiple properties on the line and where your sewer line joins the Water Board or Municipal or Council sewer mains.

Be aware, some inner city suburbs like Paddington and Balmain have rows of terraces with up to 20 homes, and in some cases more, running through the one sewer line across the back or front of the properties.

Whenever you have a blockage in a joint or common service, it’s imperative that all parties on the common line realise that the problem is the responsibility of all parties on that common line.

That means the costs of any repairs or service  to this common line should be borne by all parties on the line!

A current drainage diagram will show who is connected to the common sewer line and who isn’t.

If you have a hint of a blocked drain and you need to stop tree roots in drains, have a sewer diagram within easy reach!

Costs of this diagram will vary, dependent on the source and may range between $16 and $60.00


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