Why Below-Ground Bathrooms Need a Sewage Lifting Station

A basement floor sits below the municipal sewer line, so wastewater cannot drain by gravity. A sewage lifting station collects the wastewater in a sealed tank and pumps it up to the main drain automatically. Compact units such as the Grundfos SOLOLIFT2 serve a single WC or bathroom, while larger stations such as the Grundfos MULTILIFT handle a whole basement floor with several drainage points. Before selecting a model, confirm four things: the number and type of drainage points, the vertical lifting height, the horizontal discharge distance, and whether a twin-pump setup with a high-level alarm is needed. Official data for comparison is available on our Grundfos product pages.