The suction strainer is equipped with a strainer insert made of stainless mesh that has a nominal fineness of 200 my as standard. The filter housing is made of polypropylene, which is resistant to a variety of liquids. The strainer is easily cleaned by unscrewing the lower part of the filter housing and then rinsing or blowing clean the strainer cloth. The suction strainer is mounted before the waste oil pump in order not to damage the pump.