Maelstrom On-Tank’s ultra-fine secondary filter removes particles down to 180 microns – 5 times finer than standard rain heads and pre-tank filters. This gives you cleaner, better quality water and lowers the volume of sediment putting pressure on your tank pumps and post-tank filters.
Maelstrom On-Tank eliminates the problem of water splashing off your tank inlet screen, especially at high flow rates. Its phenomenal water catchment efficiency (96% at 3,600 litres/hour in wet systems) gives you more water, faster, so you can take full advantage of every raindrop.
Maelstrom On-Tank’s initial 2mm filter diverts leaves and debris which are then flushed out during rainfall events. Because the revolutionary design is low-maintenance with no mechanical parts, it does this with minimal effort from you.
Maelstrom Filters filter leaves and debris out of your downpipes with their 2mm bucket, 180 micron filter bag and 0.955 mozzie proof screen. They also minimise splashing to increase the volume of rainwater you harvest.
Maelstrom Filters secure the system with the triple layer filtration that prevent insects and other animals from entering and breeding or living in your downpipes.
Maelstrom Filters help you Plan for Volume with maximum rainwater capture potential. The ability to capture more water at higher flow rates means you can more easily predict your capture and water usage.
For best performance, check and maintain your Maelstrom on a regular basis. The required frequency of maintenance will depend on the environment in which your Maelstrom is installed. High debris areas will require more regular maintenance than low debris areas.
To determine how frequently maintenance will be required in your location, we recommend inspecting the primary and secondary filter after the first rainfall event and planning your maintenance schedule based on this initial inspection.
To clean your Maelstrom, unlatch and remove the lid.
Grasp the handle at the front of the filter and lift it upward to remove. Release the four handle clips, slide the handle off the primary filter and remove the secondary filter. Use a hose to wash out the secondary filter. If required, you can use a brush to remove any debris. Lift the mosquito proof screen out and brush or hose off any debris on either side of the screen.
Replace the mosquito proof screen, ensuring it sits securely in place. Replace the secondary filter and re-secure the handle. Return the filter to its position within the filter housing and clip it back in place, then replace the lid and secure it with the latches.
Every environment is different, so the necessary frequency for cleaning your filter screens will vary. We recommend checking your Maelstrom filter regularly after installation to determine the rate at which debris accumulates. You can then use this information to make an informed decision about cleaning frequency. Depending upon your needs and situation, you may determine that cleaning is required monthly, quarterly, after each heavy downpour, or at a different frequency.
No. Your Maelstrom is supplied with an adjustable flange that is designed to accommodate existing 300mm, 400mm and 500mm inlets. Simply remove the existing tank screen and trim the flange to suit the size of your inlet hole.
Your Maelstrom filter should be installed no less than 500mm above the inlet of the tank.
When the Maelstrom overflow is connected to an outlet, for example, a stormwater discharge, the wet system head height can be reduced to accommodate low head systems. Collection efficiency is traded-off against low head height filtration.
On a wet rain harvesting system, your Maelstrom can handle water flowing at 10 litres (2.64 gallons) per second with a water catchment efficiency of 96%. It can handle water flowing at 5 litres (1.32 gallons) per second with a 99% water catchment efficiency for wet systems. Above 10 litres (2.64 gallons) per second, your Maelstrom will direct excess water to the outlet port (overflow).
Used in a wet rain harvesting system, your Maelstrom will yield 99% filtered water catchment at 5L/sec and 96% filtered water catchment at 10L/sec.
Yes. Replacement filter bags are available for your Maelstrom filter. The Maelstrom bag is designed to be reusable and can be washed and reinstalled. In the unlikely event that your bag is damaged or lost, replacements are available from Blue Mountain Co.
Multiple pipes can be consolidated before they reach your Maelstrom filter. However, it is important to assess the impact of consolidating these pipes to ensure that your total system flow is not restricted.
Yes. You can use a tapered reducer or LIT (level invert taper) to connect 90mm pipe to your Maelstrom’s DN100mm inlet and outlet ports.
No. We do not recommend installing inlet pipes to both side ports. It is important that one side port is dedicated to overflow to allow your Maelstrom to perform its self-cleaning function and prevent clogging.
Yes. First flush diverters can be installed before or after your Maelstrom filter. If you choose to install a first flush diverter upstream of your Maelstrom, make sure you install a screened rain head before the first flush diverter so it cannot be clogged with leaves and larger debris.
No. Your Maelstrom filter is not designed to carry a head of water, as the filter uses a self-cleaning gravity feed action to discard debris from the flow of water.
However, you can install your Maelstrom filter on top of your tank in place of your tank screen (or beside your tank) as the final filtering point for your wet system.
Check the following:
If the rainfall event is extreme, it is possible for some unfiltered water to overflow from the debris overflow port. Refer to expected flow rates section.
The best way to maximise the amount of captured water from the Maelstrom is to: