SHURFLO CLASSIC SERIES STRAINER - Clean, clear economical strainers eliminate unnecessary repairs by keeping debris and other particles out of the pump. Screws directly onto the pump head. Transparent design shows when it is time to clean the bowl. Easy disassembly, cleaning and reassembly. Easy Assembly. Keeps Debris Out of Pump. Easy to See When Strainer Needs Cleaning. 50 Mesh Stainless Steel Screen. Twist-On Water Strainer, 1/2 inch NPSM Inlet, 1/2" NPSM Outlet.