It was an outstanding display by the Pres' pack where number 8 Jack Tadgh O'Sullivan dominated and he was well supported by Brian O'Connor, Conor O'Flynn and Niall O'Brien.
Pres' out half Peter Sylvester gave an outstanding display putting Rockwell on the back foot for long periods with some astute kicking.
James Broderick opened the scoring with a penalty for Pres' after ten minutes.
Following a line out won by second row Jack O'Sullivan, Billy Scannell collected went blind side to score in the corner in the eighteenth minute.
Rockwell hit back immediately with a penalty from Padraig Feehan.
Just before the break a break from a line out by Conor O'Flynn saw him link up with Cian Fitzgerald who touched down for a 13-3 half time lead.
Rockwell came more into game in the second half with Conor Cashman and David Shaw impressing with some surging runs.
Ten minutes from the finish Paul Buckley wrapped the game up for Pres', when he picked up a loose ball in the middle of the field and raced away to score under the posts and Broderick converted.
Rockwell College: Joey Noonan; Gary Kavanagh, Jamie Stone, Padraig Leamy, Loic Gately; Padraig Feehan, Oisin Mangan; Michael Kennedy, Diarmuid Barron, Kevin Kelly; Bill O'Brien, Mark Collins; David Shaw, Andrew Phelan, Conor Cashman.Replacements: Coman Ryan, Ben Halpin, Cole Ryder, Michael Murphy, Brian Fitzpatrick, Hugh McCann, Jake Flannery, Aerton Griffin.
PBC: Michael Healy; Paul Buckley, James Broderick, Jack O'Shea (capt), Michael St Ledger; Peter Sylvester, Harry Shanahan; Niall O'Brien, Billy Scannell, Kevin Morris; Conor O'Flynn, Jack O'Sullivan; Brian O'Connor, Cian Fitzgerald, Jack O'Sullivan.Replacements: Declan O'Brien, Cian Scott, Ethan Keane, Caoimh Glavin, David Duggan, David Harrington, Harry Dillon, Tom Fitzgerald.
Referee: Dave O'Flynn (MAR).