2001 APV Hot Water Set. Model: HWRU. S/N: 112-00632. Bell & Gossett Shell and Tube Heat Exchanger, S/N: 770504-01, Nat'l Bd: 74378, shell side MAWP @ 375 °F: 150 psi, shell side MDMT @ 150 psi: -20 °F; tube side MAWP @ 375 °F: 125 psi, tube side MDMT @ 125 psi: -20 °F. Inlets: (1) 3 in. dia. cold water port with a 7-1/2 in. dia. flange and (4) 3/4 in. dia. thru holes at a center-to-center distance of 4-1/4 in., (1) 3 in. dia. pipe (steam). Outlets: (1) hot water port with a 7-1/2 in. dia. flange and (4) 3/4 in. dia. thru holes at a center-to-center distance of 4-1/4 in., (1) 2 in. dia. bevel fitting with hex nut (steam out). Overall dimensions: 10 ft. 8 in. 56 in. W x 99 in. H.