Aqua Plumb, 1757CH, Replace Gerber 98-673, Hot / Cold Tub / Shower Stem, For Gerber Brand Tub / Shower Faucets. Return your faucet to like new condition with the Hot / Cold Stem 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.