These filters suit all Shurflo pumps EXCEPT Extreme 5.7 plug-in style pumps. They screw directly onto the inlet side of 1/2" threaded pressure pumps. They can eliminate unnecessary pump repairs by keeping debris and particles out of the pump. Transparent in-line filters with 50 mesh stainless steel screen & screw-apart disassembly for cleaning. 1/2" female thread to screw onto pump inlet - and 12mm hose barb inlet.