Pentair replacement White Flap Weir Pivot Tab for Admiral S20 Wedge Skimmers. The Admiral™ S20 skimmers have a PVC-reinforced twin port base. S20 may be purchased with equalizer for commercial and NSF applications or for when the second port is connected to the main drain. All models include the exclusive lock-down lid that can be personalized with custom logo disks and are available with a flap weir or the exclusive circular weir for superior skimming action.