Spa Pool Filter Cartridges Replacement fits for Waterways 817-0050, Durable
PLF6CH-940 compatible PWW50P3 (Not PWW50P4), 6CH-940, Filbur FC-0359, Waterway Plastics 817-0050. for Waterways 817-0050. for PWW50. for 6CH-940. for Filbur FC-0359. We'd like to settle any problem in a friendly manner.