Tank Cover | Water Tank Accessories | Rain Harvesting by BMCo
Prevent algae growth by keeping sunlight out of your tank without interrupting the flow of fast-moving water with the Rain Harvesting Tank Covers.
Size 300mm TASS23
Size 400mm TASS21
Size 500mm TASS22
  • 300mm
  • 400mm
  • 500mm
Tank Screens Installed

Keep sunlight out

Sunlight is a vital ingredient for algae growth. The Tank Cover minimises algae contamination by stopping sunlight from entering your tank through the inlet screen.


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Let water in

Because it’s placed over your tank screen and your inlet pipe fits into it through a cut out hole, the Tank Cover does not interrupt the flow of water into your tank.


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Install with ease

Installation couldn’t be easier. Simply cut out one of the perfectly-sized, predefined pipe inlet holes and install the Tank Cover over your tank screen. You can even secure it to the tank screen using the predefined screw holes.


Tank Covers provide additional leaf filtering over the area where water directly enters your tank assisting with filtering leaves & debris.

Tank Covers with 955 micron mesh are legally required in some countries and regions (including many Australian states) to prevent mosquitoes from breeding in your tank, ensuring a secure system. Tank Screens are installed in tank inlets to keep mosquitoes and other pests out but to allow water to pass through at full flow.

Learn more about the 4 pillars of designing a Rain Harvesting system. 

The Rain Harvesting steps addressed:

Limit sources of contamination     Plan for volume

Filter leaves and debris                    Divert the first flush

Secure the system                             Manage standing water

Consider a safety net                        Monitor and maintain

  • Specifications

    Solar Shields/ Covers Specifications

  • Installation
    1. If necessary, install an elbow so that the pipes feeding your tank are angled down towards the tank screen.
    2. Using the provided cutting guidelines and tin snips or a hole saw, cut a hole (or holes) in your solar shield to fit the pipe/s and/or elbow/s feeding your tank.
    3. Lift the pipe/s and/or elbow/s and manoeuvre the Tank Cover into place over your tank screen.
    4. Push the pipe/s and/or elbow/s through the cut holes to maintain a sunproof barrier over the tank screen and ensure all water flows through to the screen.
  • Maintenance

    When properly installed, your Tank Cover should be maintenance-free. However, we recommend lifting it up occasionally to inspect and maintain the Tank Screen beneath it.

    Alternatively, you may wish to consider installing a Maelstrom Filter rather than using a Tank Screen and Tank Cover.

  • What's in the box?
    • Tank Cover
  • Tools you might need
    • Elbow (optional)
    • Tin snips or hole saw
  • Product FAQs

    What is “water bounce”?

    Water bounce occurs when fast flowing water from your tank inlet pipes “bounces” off your mosquito-proof tank inlet screen, reducing your water catchment efficiency. This may occur during heavy downpours, when too many pipes are feeding a single screen, or if your mosquito-proof tank inlet screen has become obstructed by leaves and debris. Replacing your tank inlet screen with a mosquito-proof Maelstrom filter is an effective way to prevent water bounce and improve your water catchment efficiency. 

    How many pipes can I have going onto my tank screen?

    It is common to have two 90mm (3″) pipes feeding a single tank screen. If additional pipes are plumbed, it is important to consider the capacity of your tank overflow outlets. Your outlets should balance your inlet pipe volume so that the combined cross-sectional area of the inlet pipes does not exceed the cross-sectional area of the outlet. You may need to install an additional tank overflow outlet or enlarge your existing one to accommodate the volume of water from additional inlet pipes. 

    My tank is overflowing at the inlet rather than the outlet. What should I do?

    Your tank outlet may be blocked by a blocked Mozzie Stoppa or another obstruction. Alternately, the bottom of your tank overflow may sit above the base of your tank inlet screen and/or tank inlet.  

    Check your overflow outlet for the presence of a Mozzie Stoppa or other obstruction. If a Mozzie Stoppa is installed, remove and inspect it and clean if necessary before reinstalling it at the outlet or replacing with a Mozzie Stoppa Easy-Clean. Remove any other obstructions from your tank overflow outlet. 

    If a blocked Mozzie Stoppa or other obstruction is not the cause of your inlet overflow problem or if your inlet overflow problem persists, check to ensure that you have an appropriate height tank overflow for your tank. The bottom of your overflow should sit below the level of your tank inlet screen. If you have an overflow that sits above the base of your tank inlet, you will need to replace it with a lower tank overflow. 

    Do I need to screw my Solar Cover onto my tank screen?


    Why is there a film on my tank screen?

    Fine particles can accumulate on your tank screen’s mosquito-proof mesh. This may block the water flow. To prevent this problem, regularly maintain your tank screen or replace it with a Maelstrom filter. 

  • Gallery

    Solar Cover Insitu Green Tank

    Solar Cover Product

    Solar Cover And Tank Screen Product Displayed

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