ACV Prestige Solo 60 Installation And Maintenance Manual page 97

Product Specifications
Side View PRESTIGE Solo 399
21 1/4" [540 mm]
15 3/8" [390 mm]
5 7/8" [150 mm]
14 3/4" [374 mm]
16 3/8" [416 mm]
91
3/4" NPSC Pressure Relief Valve
4" Vent Outlet
4" Combustion Air Inlet
1 1/2" NPT Boiler Supply
1 1/2" NPT Boiler Return
1" Gas Connection