The water goes through the sieve and the waste solids will slowly go down to the waste area at the bottom of the Sieve where they can be flushed away manually. At the waste outlet of the filter is a 2 inch male thread connection with end cap for attching a 2 inch slide/Ball valve to easily wash away the waste with water.
When the water in the tank underneath the Sieve is not pumped away fast enough the water will raise which makes the floating system go up to reduce the incoming water flow
An extra advantage of this Ultrasieve Midi pre-filter is that the water will be provided with extra oxygen as passes through the Sieve, also the waste is kept out of the water and not degrading in to the ponds environment so only clean water is passed to the biological filter.
Cleanng the waste that has accumulated on the screen is easy, simply pushing down the adjustable dam will flood the screen with water adn with the waste valve open all the collected debris will be flushed away. As simple as that. The Sieve screen can be reomed fom time to time to thoroughly clean the screen when necessary.
UltraSieve Midi Technical Specifications:
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Maximum flow: 12000 lph.
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Dimensions: 74 cm (h) x 27 cm (w) x 56 cm (l)
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Inlet: 110 mm
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Outlet: 2 inch
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Sieve Bend: Stainless Steel 316
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Capacity Max: 12000 lph
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Sieve Screen: 300 micron Stainless Steel.
Theses are really excellent little pre-filters. Ideally these are installed before a biological filter such as an EconoBead Bead Filter.