Tank Cleaning

Rainwater tanks should be inspected and cleaned at least every 2-3 years to ensure that the water is in good condition for use within a house or business. Over time leaves, dirt, pollen, gum nuts and other material may enter the rainwater tank as it rains and build up on the tank floor. Here they break down, dissolve, go rotten and contaminate the water making it foul tasting and putrid. This will greatly affect the quality of the water.

"We clean water tanks when full or near empty with a process that uses minimal water"

We offer professional water tank cleaning service to remove the sludge from your rainwater tank walls and floor. Our process is accurate and efficient and removes minimal water. The tank water is not stirred up and can be used the same day after cleaning. We can clean your rainwater tank either full or near empty and don’t need to remove all the water.

Watch Our Tank Cleaning Process!

We clean traditional galvanised iron tanks to remove dirt and rusty flakes from the tank floor.


We clean poly and fibre-glass tanks to remove slime and sludge from the tank walls and floor.


We clean concrete tanks above or below ground to remove leaves, sludge and often plant roots.

We restore filthy water tanks back to as new condition

Before Cleaning

After Cleaning

"Trust only the Licensed Professionals"

Quality Service

All employees of The Tank Doctor are experienced professionals. Each member is fully trained and licensed in Confined Space Entry, have White Card training and are fully insured. We clean rainwater tanks in a safe and hygienic manner using the latest safety equipment with a minimum of two employees on site at all times.

We professionally clean above and below ground rainwater tanks for domestic and industrial locations in a safe manner according to the laws of confined space entry. We offer a pressure cleaning and vacuuming service that removes sludge build up from tank walls and floor which restores the tank to as new condition. Sludge and waste water can be removed from site if required and we can arrange fresh water delivery if needed.

Tank Cleaning Adelaide

Tips to help keep Your Rainwater Tank in Good Condition

The problem starts at the collection point. Leaves piled on the roof and in the house guttering create tannin staining of the water and quickly find their way down into the rainwater tank.

Leaves trapped in tank inlet screens must be cleared on a regular basis. If left to build up they will pollute and tannin stain the rainwater as they decompose acting like a giant tea strainer.

Bird waste  can introduce harmful bacteria such as E-Coli, Giardia, Salmonella, Campylobacter and Cryptosporidium to the rainwater supply. Watch for birds nesting under solar panels!

Animal waste on the roof and in the guttering can introduce unsafe levels of bacteria to the rainwater supply so check under overhanging tree branches. Filtration with U.V. sterilisation is  recommended.

It is very important that all water inlets to rainwater tanks and overflow outlets be screened to prevent rodents, birds, bats, snakes and possums from entering the tank in search of a regular water supply. Once in the tank they cannot escape where they will sadly die and quickly pollute the water!

Many people claim ‘My rainwater is fine, never hurt me’, ‘Been drinking it all my life, it’s natural’, ‘I don’t need my tank cleaned or filters installed’. That is fine, they have a right to their own opinion but here are the facts. Studies have been done on rainwater tanks that revealed a high percentage of tanks are not safe to drink from and contain dangerous levels of E.coli bacteria. With a dead possum inside your rainwater tank how safe do you think the water would be to drink? You decide.

Sludge breeds bacteria in down pipes especially over the summer months so ensure they are drained as often as possible. Underground concrete rainwater tanks need to be inspected at least every 12-months for tree roots penetration as water pollution and damage to the tank can occur.

Another serious rainwater contamination problem is the supply of rainwater from the house gutters to the tank via a ‘Wet System’. This is where the rainwater travels from the guttering down into a sealed system of underground pipes and then up and over into the rainwater tank.

This ‘Wet System’ works well when it is raining however when the rain stops the water in the wet system becomes stagnant and this pollutes the water with bad colour, taste and odour. The next time it rains this putrid water is flushed 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 at the lowest point possible. If access to this point is unavailable, install the flush valve at ground level and open the valve several times when it is raining heavily to flush out the lower sludge level in the bottom of the system.

This water pipe cross-section shows the sludge buildup inside a non-flushed wet-system.

Installation of a 90mm PVC Gate Flush Valve allows quick flushing of the wet-system line.

Contact Us Today

Please fill in your details below and include information about the size and style of your rainwater tank(s) and the depth of water that is currently in each tank. We will contact you as soon as possible with details of what services we can provide. Thank you.

Please note: We sell and distribute rainwater filtration systems Australia wide. Tank cleaning with The Tank Doctor is only currently available in Adelaide at this stage.

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    Install a Whole House Rainwater Filtration System to perfect your water