Hayward SkimMaster SP1071T2 1 1/2" FPT Gunite Skimmer. Designed for large-capacity commercial and residential applications, SkimMaster Series skimmers boast one of the highest flow ratings in the industry at 75 GPM. They feature threaded internal connections for pressure testing, an optional float/bypass valve, a field-installable water bonding kit and an automatic safety bypass for low water conditions.