• To be able to wash large milk lines satisfactorily, using the minimum amount of water is in itself an achievement. The secret is in being able to cover the total surface area of the inside surface of a large bore milk-line using a smaller bore wash line. Yet again PEARSON has come up with a revolutionary method of cleaning these pipelines. By creating a slug of water within a section of stainless steel pipe and then moving this slug of water down the pipeline (in slug form) many times a minute, allows perfect cleaning of large diameter milk lines.