What Makes Up a Functional Drainage System?

what makes up a functional drainage system

What Makes Up a Functional Drainage System?

A good drainage system has many components: downpipes, pipelines, and home gutters, to name a few. All these components must be appropriately set up around your house and connected to the city’s drainage system to ensure that your area won’t get flooded.

An improperly installed drainage system could cause numerous problems not only for your home but for your neighbourhood. For example, if stormwater and household water do not drain directly to the sewer, it could damage your property. In addition, improper drainage installation can result in leaks, mildew and mould growth, a damaged roof and home foundation, and flooding.

To guarantee the quality of your drainage system, ensure that it follows the Plumbing Code of Australia (PCA) and contains all these components below:

Stormwater Drainage

A drainage system that does not direct stormwater to the sewer could cause problems to the neighbourhood. Having an efficient rainwater collection system also lets you reuse the water for watering your lawn. But if you’d rather not, you can direct all stormwater to the city’s main lines. Also, ensure that your home’s drainage includes provisions for rainwater.

Gutter System

Your gutter system serves as your house’s defence against heavy rainwater, making it essential in keeping your property undamaged. Your gutter diverts rainwater away from your house, your driveway, and your lawn to prevent it from ruining them. In addition, it prevents flooding in your basement, as well as possible soil erosion.

It also works to protect your house’s paint and avert any mildew and mould growth. Without a gutter system, rainwater could go to any part of your property. It can destroy your ceiling, walls, electrical wirings, and anything else that gets damaged with moisture.


Downpipes take stormwater directly from your gutters to your city’s central underground drainage system. Its primary role is to keep stormwater away from your property to prevent any damage. Therefore, the specifications for the downpipes you use must correlate with the amount of rain your location usually receives. In addition, it must have brackets, offsets, and joiners that depend on your home’s needs.

Sewer Drainage System

Your sewer drainage system comprises underground pipes that direct water from your bathroom, kitchen, laundry, and sinks to the city’s central sewage system. The waste coming from your household is then transported to your city’s treatment facility, where rubbish and organic things are separated. The treatment facility may choose to recycle the water or direct treated water to the creek or the river.


P-traps are found under your sinks and any plumbing component. It is a curved section shaped like the letter P. It holds any stagnant water to avoid sewer gases from rising from the sewer system and into your home.

Toilet Traps

Like the P-trap, the toilet trap is a curved drain that holds stagnant water and prevents sewer gases from entering.

Branch Drain Lines

The branch drain lines link your house’s plumbing fixtures to the main drain lines found in your walls, floor, and ceiling.

To Sum It Up…

Your home’s drainage is an intricate system that needs to be properly installed to prevent any severe damages to your property. It is one of the most critical components of your home, as it prevents waste from causing harmful diseases to you and your family. To ensure that it is in its optimal condition, do your share of maintenance or call professional services.

Plumd in Plumbing is a Sydney-based service provider that can solve any damage to your drainage and plumbing system. We tend to commercial and residential plumbing, hot water systems, and issues involving gas and drains. For over 15 years, we’ve catered to plumbing services in The Northern Beaches, making us experts in the local system. So get in touch with us and let us know how we can help!

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