Aqua Plumb, 1744D, Replace Gerber 98-726, Diverter Stem Unit, For Gerber Brand Tub / Shower Faucets. Return your faucet to like new condition with the Diverter Stem Unit for Gerber Tub and Shower Faucets. The metal construction provides strength and durability. This stem includes a seat and is designed to be used with Gerber faucet models 60, 80, 82, 100, 582, 642 and 800.