Ground Joint Control Stop Adapter, Ground Joint Angle Stop Upgrade Valves Retro-fit adjustable tailpiece valves on existing ground joints stops Toilet flush-valve tailpiece and stop repair parts are components for replacing the fittings that connect a flush valve (flushometer) to the water supply and control flow through the valve. Saves time and avoids potential behind-the-wall issues - Flush Valve to Mate with Ground Joint Control Stop Converts Delany and Compatible with Zurn Old Style Sloan stops Chrome Toilet flush-valve tailpiece and stop repair parts are components for replacing the fittings that connect a flush valve (flushometer) to the water supply and control flow through the valve. Retro-fit adjustable tailpiece valves on existing ground joints stops