Grundfos 98365986 Level Switch. Grundfos Level Switches are specifically designed to control liquid levels in raw sewage pump stations applications. The Level Switch is also suitable for use in municipalities, commercial and residential applications. This Grundfos 98365986 Level Switch is a non-mercury type switch designed for Grundfos SLC and DLC controls. This Level switch also features a thermoplastic rubber cable that makes the level switch resistant to many chemicals, alcohol, uric acid, sewage, oils, petrol and fruit acid. Note when installing this Grundfos 98365986 Level Switch make sure that they are suspended freely and vertically, they do not rest on the pump and that they can float without interference from walls, pipes, and fittings.