The Zurn® Z1172 Large capacity acid resistant coated interior and exterior fabricated steel grease interceptor, with internal air relief by-pass, bronze cleanout plug (which can be used as a sampling port) and visible double wall trap seal that comes standard with pressure equalizing/flow diffusing baffle. The gasketed non-skid secured cover with removable lift handles and flow control fitting. Regularly furnished with inlet and outlet in high position.