Gecko Alliance 91040820-000 Wet End Assembly For 1.5 HP 48 Frame Flo-Master CP Pumps. This item is a replacement part for use with Gecko Alliance 1.5 HP 48 Frame Flo-Master CP Pumps. This is a genuine Gecko Alliance part, designed to provide Gecko Pump owners with the same reliability they have come to expect. Easy to install, Gecko Alliance parts are made with premium materials and can be trusted to deliver high quality performance and efficiency.