Loop UV Lamp, 254 nm RAUV620A1/RAUV843A1 is used to limit bacterial growth in the loop. Purification Technologies:  Suitable for Super-Genie water systems: Order Information: Description Catalog No. Loop UV lamp, 254 nm, 620 mm RAUV620A1 Loop UV lamp, 254 nm, 843 mm RAUV843A1