Is it important to use a prefilter?
To ensure problem-free operation when water is drawn off, prefilters are used. Otherwise, given the small diameters of some water taps, washing machine pipes, WC cistern valves, sprinkler and spray nozzles, blockages may occur. Kärcher booster pumps have an integrated prefilter with a 500µm mesh gauge as standard. If the water is especially dirty or sandy, we recommend using an additional pump prefilter (Kärcher accessory number, up to 3,000 l/hour 6.997-343 or up to 6000 l/h 6.997-344.0). This has a 250µm mesh gauge.
