FLEXIBLE DISPOSAL TAILPIECE WITH FLANGE Plumb Works Model 6812056 Recommended procedure for installation FOR SINGLE BOWL INSTALLATION: 1.Push steal flange onto the flanges side of flexible tailpiece. 2 Attach the rubber gasket onto the flanges end of the tailpiece. Be aura that the flange lip fits into the inner groove of the gasket. Note: If your existing disposal tailpiece used a plastic tailpiece washer one ls Included In package. 3.Attach steel flange to garbage disposal discharge.