The 3153 and 3171 pumps are suitable for low-flow wastewater applications.

The self-cleaning N-pump has a semi-open impeller as opposed to a channel impeller, which can become clogged. The N-pumps’ impeller has with a relief groove in the volute which Flygt says has been proven to reduce the risk of clogging and maintain pumping efficiency. This can also result in lower overall energy consumption, which reduces the lifetime cost of a pumping operation.

The 3153 and 3171 pumps have a maximum discharge head of about 90 m (300 ft).