Tank Cleaning


When was your rainwater tank cleaned last?

Rainwater tanks should be inspected and cleaned every 12-24 months to ensure that the water is good condition for used within a house or business.

Over time leaves and dirt may enter the rainwater tank and build up on the floor. This will greatly affect the quality of the water as the contaminants dissolve and break down. A very good example is the process of making a cup of tea where tea leaves are used to colour and flavour water likewise leaves, pollens and dirt left in the rainwater tank will breakdown and dissolve into the rainwater supply creating awful colour, taste and odour.

Insects, frogs, animal waste, reptiles like lizards and snakes and also rats and mice are very commonly discovered decomposing on the bottom of the tanks we clean. Clients ensure that their rainwater tank is sealed and they cannot enter the tank however this is incorrect because they often still find their way into the rainwater tank through water inlet pipes, cracks, holes, incorrectly fastened or left open manhole access covers, tank overflows, disconnected pipes etc.

Tank inspection and cleaning should be done on a regular basis regardless of how clean the water may seem at the time because one of these contaminants can quickly create a very large problem with the water supply which can lead to a serious illness and hospitalisation of a family member.

Tank cleaning in AdelaideWith the rainwater tank cleaned and inspected on a regular basis we also recommend a rainwater filtration system be installed. Read more about Rainwater Filtration »

During the hot months when water is scarce possums, rats, mice and often snakes seek a drinking water supply at all costs and will force their way into a rainwater tank anyway possible and end up drowning in the tank. With the client unaware of this occurring can become very ill very quickly.

Another serious rainwater contamination problem is through the supply of water via a ‘wet system’. This is where the rainwater travels from the guttering down into a sealed system underground and then up and over into the rainwater tank.

PVC Gate Valve 90mm

90mm pvc gate valve
Price: $95.00

This ‘wet system’ works well when it is raining however when the rain stops the water in the wet system becomes stagnant and can heat up in summer months.

As the wet system pipeline contains contaminants as mentioned above it quickly breeds bacteria and often a horrible smell. The next time it rains this putrid water is flushed up and over directly into the rainwater tank. It is extremely important that this water is drained from the wet system at the lowest point as often as possible when it is not raining. This will ensure a clean pipeline awaits the next rain.

We recommend the installation of a 90mm PVC Gate Flush Valve to the wet system.

Confined space entry
WARNING! Don’t risk using untrained and unqualified tank cleaners to perform tank cleaning in confined spaces. It is illegal for anyone including the home owner to enter any style of rainwater tank above ground or below the ground.

The Tank Doctor cleans all types of rainwater tanks including:

  • Modular Tanks
  • Galvanised Tanks
  • Polyethelene Tanks
  • Fibreglass Tanks
  • Large Concrete Tanks and
  • Underground Tanks
  • Poly Lined Steel Tanks

Danger: Confined space


Entering a rainwater tank is illegal unless the individual and/or company is licensed to enter a confined space to the standard AS/NZS 2865:2001 and has been issued with the appropriate entry permit.All employees of The Tank Doctor® are fully licensed and qualified to perform tasks within a confined space.

The Tank Doctor can clean rainwater tanks, and offers professional tank cleaning in the following areas of Adelaide, South Australia: Mclaren Flat, Mclaren Vale, Happy Valley, Willunga, Meadows, Flaxley, Macclesfield, Strathalbyn, Kangarilla, Echunga, Prospect Hill, Ashborne, Clarendon, Chandlers Hill, Cherry Gardens, Ironbank, Upper Sturt, Onkaparinga Hills, Crafers, Crafers West, Longwood, Scott Creek, Stirling, Bridgewater, Aldgate, Mylor, Coromandel East, Coromandel Valley, Blackwood, Belair, Glenalta, Horthorndene, Mt Barker, Littlehampton, Hahndorf, Verdun, Nairne, Balhannah, Oakbank, Woodside, Lobethal, Lenswood, Forest Range, Cherryville, Norton Summit, Basket Range, Ashton, Uraidla, Summertown and Piccadilly.