1/2" Swivel (pump Side) X 1/2" MPT. Even your clean drinking water tanks can accumulate small particles which are carried in with city water. These economical strainers eliminate unnecessary repairs by keeping debris and other particles out of the pump. They attach by threading directly to male pumphead threads without additional hardware. The transparent design lets you see when it's time to clean. Easy disassembly, cleaning and reassembly. Fits all Shurflo multi-fixture demand pumps. Features: Unlike the Twist-On strainers in this series, the orientation of these Swivel-Nut strainers can be predetermined prior to tightening. At 50 mesh, this is a Fine screen filter. Stainless steel screen is standard. NPS- Female (National Pipe Straight thread) outlets thread directly onto the pump inlet.