Hayward SP1078 Equalizer Valve Replacement for Hayward Skim Master and Auto Skim Series Pool Skimmers Equalizer valve replacement Fits Hayward SP1070 Skim-Master and SP1080 Auto-Skim series skimmers Diverts all flow to the pump from the equalizer line and prevents airlock in the pump When the pump is shut off and the water level condition is corrected, the float will rise and the equalizer valve will close Allowing normal skimming operation when the pump is restarted