A first-half David Treacy goal proved the deciding factor at Parnell's as DIT withstood a strong challenge from UL to secure a vital victory in Group D.
The Dublin outfit had moved into an early three-point lead thanks to well-taken points from Treacy (two) and Michael Moloney, and despite UL reducing the deficit thanks to a brace from corner-forward Kieran Morris, a terrific individual goal from Dublin inter-county forward Treacy was a major boost for Joe Fortune's charges.
UL kept in touch until the interval, with Morris scoring two, but DIT led 1-8 to 0-8 at half-time.
Adrian Ryan nabbed two scores to bring parity and the sides swapped points until the final quarter when DIT went for the kill with two Moloney points.
Scorers – DIT: D Treacy 1-3, M Moloney 0-4 (3f), T Connolly, N Quinn 0-3 each, J Hobbs, W Cullen 0-1 each. UL: K Morris 0-5 (4f), P Kelly 0-3, J Fitzgibbon, A Ryan, J Glynn 0-2 each, P Walsh 0-1.
DIT – F McGarry; J Divney, G McManus, C O'Shaughnessy; D Curran, L Rushe, K Bergin; S O'Connor, S Morris; S Ryan, M Moloney, N Quinn; D Treacy, T Connolly, J Hobbs. Subs: W Cullen for Ryan (34), J McManus for Hobbs (46), L Prendergast for Morris (55).
UL – N McGrath; M Carmody, P Stapleton, P Ryan; G Brennan, C Ryan, J Gallagher; M Fennelly, S Golden; J Fitzgibbon, A Ryan, P Walsh; K Morris, P Kelly, D Butler. Subs: J Glynn for Butler (h-t), E Murphy for Walsh (47).
REF – C Browne (Galway)