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: