SimTech No Vault Pump Filter - STF-NV06-18-1.25 - Extend The Life Of Your High Head Effluent Pump The Pump Saver Filtration Screen for high head effluent pumps is designed to extend the life of the pump by filtering the intake liquid toensure the pump will not clog with debris. Provides nearly 35 times the filtration area than that of the original screen on most high head effluent pumps. This simple but effective unit is easily installed in new systems or retrofit onto existing systems. Fits Most High Head Effluent or Spray Irrigation Pumps 1/16 Inch Diameter Perforations