Leinster Under 13s took an unassailable three-nil lead against the NCU in their four-match series, but were pushed all the way as James West scored a quite brilliant 132 in a high scoring game at Pirrie Park.
Leinster captain Brian Dunphy led from the front as the Balbriggan youngster hit 18 fours and a six in a superb 95 as his side posted 247 for 9.
There were runs too for Robert O'Brien (40, Ethan Clarke (31) and Gareth Morgan (23).
NCU Under 13s
Ben Walsh picked up three wickets, while Jack Smyth claimed two, while there was one apiece for James West, Jordan McKeown, Luca Bates and Reuben Edmundson.
Despite the formidable target the hosts made a real game of it, with James West - son of former Irish international Regan - making a quite magnificent 132.
He hit 13 fours and cleared the ropes five times, as he and Seb Yeates (43) shared a century stand.
In the end though four wickets for Raif Duncan (4-27) and two for Aadi Wankhade (2-33) sealed the win for the young Dubliners.
The fourth and final match of what has been an enthralling series takes place on Friday at Ringcommons.
Under 13 Boys IP40 series
At Pirrie Park, Leinster U13s beat NCU U13s by 15 runs
Leinster 247-9 (40 overs; Brian Dunphy 95, Robert O'Brien 40, Ethan Clarke 31, Gareth Morgan 23; B Walsh 3-28, J Smyth 2-27)
NCU 232 all out (38.2 overs; James West 132, Seb Yeates 43; Raif Duncan 4-27, Aadi Wankhade 2-33)
Leinster lead the series 3-0.