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4" Maelstrom Filter

4" Maelstrom Filter 4" Maelstrom Filter 4" Maelstrom Filter
4" Maelstrom Filter
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180 micron filter
Single point, tank-top filter with ground breaking U-shaped design
Blocks out light that supports algae growth
Significantly increases water catchment efficiency
Self-flushing to reduce cleaning leaf and debris build-up


Rain Harvesting 4" Maelstrom Filter, part# RHML01 combines super-fine filtration and super-high water catchment efficiency to give you cleaner rainwater and more of it. The Maelstrom On-Tank's ultra-fine secondary filter removes particles down to 180 microns, which is 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 liters/hour in wet systems) gives you more water, faster, so you can tank full advantage of every rain drop.


TASS26 20 Inch Tank Screen


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Size Comparison

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At Scale

Additional Information

Store ID X8027692
Manufacturer Info
Product Part # RHML01
Manufacturer Rain Harvesting
Installation Instructions Rain Harvesting RHML01 Product Specifications
Physical Features
Weight (lbs) 5
Dimensions 20" Length x 21" Width x 15.5" Height
Color Black
Product Type Rain Harvesting Filter
Shipping Info
Shipping Locations Georgia
Shipping Zip Codes 30309
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