Can You Drain Rainwater Into A Sewer?

Can You Drain Rainwater Into A Sewer?

Some people don’t have rainwater tanks installed on their properties. These are generally large concrete vessels used to collect and store rainwater that falls off a roof, so that it can be used later for water usage instead of the mains water. This process is called rainwater harvesting.

In the absence of water tanks, where do you think people direct their rainwater to? Is running it into a sewer, a possibility? Well, it can be; but there are risks, such as the following.

  • RainwaterA heavy rain event may cause overflowing of the water treatment unit, which is attached to the sewer. When this happens, the treatment that’s taking place will be nullified. This overflowing will also result in environmental damage. Why, because all the solid wastes, fats and oils that could have been removed, may continue to move across the system and can be discharged to the water courses, like streams and rivers? Thus, the water becomes polluted.
  • The rainwater is usually cleaner and of good quality, when you direct into the sewer water, its quality will be destroyed.

These are some of the reasons why you should make efforts to ensure that the rainwater is drained away to the appropriate location, such as a water tank. Collecting and storing rainwater in water tanks provide several advantages, such as the following:

  • Reduced monthly water bills, because when you use water from your water tank for cleaning, laundry, garden and toilet, your water usage is minimised.
  • No or less strain on the stormwater drainage system.
  • You retain water close to the source.
  • Less flooding and erosion, thus helping the environment on a larger scale.
  • Installing a water tank in your home can add value to the property.

Let’s consider that a well-maintained water tank has an expected lifetime of anywhere from 20 – 25 years and over that period and you can gain significant savings on your water bills. Water tanks also help in a water crises, providing fresh water, in situations like  droughts and water restrictions.

Rain Cycle can help you install a rainwater tank, so that you can use the stored water when required at a later time when needed. This is great for environmental and economic reasons. Rainwater tanks will help lessen the harm to our water ways, resulting from an overflow of storm water. In flushing toilets, washing clothes or cars, watering your gardens, your demand for water from the mains, will be significantly reduced.

Is the rainwater tank worth the cost? We think so, and here’s why. Over that time, you can look forward to savings on your water bills. In addition, storing water in tanks can help solve our water crises and you can depend on available water, when water is scarce.

Contact us today, if you need more information about our rainwater tanks, on 1800 006 176 or visit us at

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