The progressing-cavity grinder pump from Flygt - a Xylem brand provides the high head needed for low-pressure sewer pumping. It is powered with a small, low-amperage motor that runs from a standard domestic power supply. It is available in both single- and three-phase versions and has a robust, high-chrome steel grinding mechanism, according to the maker. It is built from cast iron to industrial specifications, with a Class F motor that produces a stable flow at high heads and low flow at high heads. It can be ordered as part of an all-in-one package including pump, prefabricated basin and pump controller. 855/995-4261; www.flygtus.com.