The Lismore City Council was having chronic problems with their digester pump choking at their South Lismore sewage treatment plant.
The sewage pump would choke on a daily basis during its job of turning over the digester, according to Mr Matt Potter and Mr Brad Hampson at the plant. They were using a Gorman-Rupp T3A3S-B self-priming pump, but the sheer number of rags made it very difficult for even this excellent solids handling sewage pump to pass all the rags, all the time.
Over the years, they tried different wear plates (even from different companies), but the best they could achieve was to limit choking to once or twice per week by installing one of Gorman-Rupp’s self-cleaning wear plates.