PWT® Transformers Used to operate multi-combinations of fixtures. EL-154 EL-154 (Box Mount) 120 VAC Input/24 VAC Output, 50/60 Hz, 50 VA. One EL-154 transformer will power up to ten (10) OPTIMA “ES-S” water closet or urinal (any combination) flushometers. EL-208 MICRO Plumb Products 100 VA Transformer. Foot-Mount Transformer designed for use with PW Systems. EL-386 Transformer 6 VAC EL-451 Transformer 6V 25 VA MCR-426 MICRO Plumb Products 24 VAC/50 VA Plug-In Transformer. Class 2 Transformer MCR-427 MICRO Plumb Products 24 VAC/100 VA Plug-In Transformer. Class 2 Step-Down Transformer