Hydra Trio With 90 Mic Self Cleaning Filter Included, Justadd 2 X 10” Std Filter CartridgesA Hydra Trio Self Cleaning Filter with 1 BSP Plastic inlet outlet with 90 micron stainless steel mesh filter moulded to 2x empty 10 standard housings. For a complete solution Just add two filters that suit your needs from our range of 10 standard filter cartridges. Flow rates will vary depending on which filter cartridges you select. Suitable for coarse sediment filtration on non potable rain water supplies, municipal water supplies, as a pre filter