Newbridge soon found their rhythm though and levelled matters through a converted effort from captain Marcus Kiely on 35 minutes.
It was all Newbridge in the second half then, Johne Murphy's side running in scores through James Gaire, David O'Sullivan, Donough Lawlor, Kiely and Conor Halpenny.
Newbridge College - S Cahill; J Gaire, M Kiely (capt), S Fata, D Conroy; S Prendergast, C King; P Leavy, F O'Malley, B Watson, P O'Flaherty, D Mangan, M Dennis, C McGroary, D Lawlor. Reps: G McNelis for O'Malley, Z Ahmed for Watson, D O'Sullivan for Fata (all 38 mins); L Dunleavy for Dennis, J Shanahan for Cahill (both 57); L Borgonova for Leavy (61); H Masterson for O'Flaherty, C Halpenny for King (both 65 mins).
CBC Monkstown -J Brindley; M Newman, R Browne, S Cronin, J Newman; E Quinn, E Watson; C McCoy, S Flannery, C Eivers, J Balmaine, H Ross, C Anderson, S Montayne, L Foster (capt). Reps: M Donnelly for Balmaine (42); P Duffy for J Newman (46); H O'Neill for Anderson (55); J O'Donoghue for Quinn (57); A Lee for Newman, J Reynolds for Montayne and S Comiskey for McCoy (all 68).