Hayward SP1424S Adjustable Inlet FittingThe Hayward SP1424S is an adjustable wall floor return inlet fitting from the SP1424 SP1425 series for in ground concrete pools. It uses a 1 1 2 inch socket (slip) by 2 inch MIP connection and incorporates a front grate with a center access adjustable spinner valve disc. Compatible with Hayward SP1424 SP1425 return inlet systems for concrete installations; hydraulic guidelines indicate 50 gpm max on 1 1 2 inch lines and 85 gpm max on 2 inch lines.