Taco 110-557 Bronze Union Flanges 3/4-Inch NPT A secure connection is simple and quick with this half-union set; it makes disconnecting your pump for maintenance a breeze Product Compatible with: 003-SC4-1, 003-SC4-IFC, 003-SC4-1-PNP, 003-SC4-4PNP, 003-SC4-3PNP, 003-SC4-5PNP, 003-SC4-2PNP Product Compatible with: 006-SC4-1, 006-SC7-IFC, 006-SC4-1-PNP, 006-SC7-4PNP, 006-SC4-3PNP, 006-SC7-1PNP, 006-SC4-2PNP