Cam Couplings (or Cam and Groove) are a quick and easier method of connecting and disconnecting pipes and hoses.  Because there are no threads to become fouled, cam and groove couplings are popular in moderately dirty environments, such as septic tank pump chambers.  While these cam couplings are commonly available in several materials, including stainless steel, aluminum, brass, and polypropylene, Sim/Tech Filter has PVC Cam Couplings that are glue-able with PVC cement opening there use with PVC pipe.  This opens the unit to many more uses such as disconnecting pumps from discharge pipes.