The pre-filter is particularly suitable for devices without an integrated filter with a flow rate of up to 4,000 l/h and a G1 connection thread (33.3 mm). For effortless cleaning, the filter cartridge can be easily removed. The mesh size of the fine filter is 250 µm (0.25 mm). Thanks to the radial PerfectConnect sealing principle of the new BP accessories, reliable sealing and easy installation are guaranteed.