Self-priming, a large pre-filter and a safety hose adapter are just some of the advantages. Square basic shape for a large filter volume and high stability. Self-priming for quick filling of the filter container Safety hose adapter; can only be released when the valves are closed. Large pre-filter holds back coarse dirt and extends the service life of the biological filter material. Product dimensions 330 x 330 x 567 mm (W x D x H).