Pre-filters remove coarse dirt particles from water before it reaches the main filter, helping the filter do its job better and for longer. The Aqua Forte® UltraSieve III sieve filter takes water from a skimmer and/or bottom drain and runs it through a 300 micron (0.3mm) sieve, removing minuscule particles and allowing water to flow through. Increase the effectiveness of your biological filter, or combine with a bead filter for the ideal Koi pond filtration system.
4" discharge port with gate valve makes for easy waste removal
Includes (2) 4" water inlets and (1) 2" water outlet