Andrew Smith and Dave Kilcoyne scored the other tries for Anthony Foley's side at Thomond Park, with JJ hanrahan contributing three conversions.
Elsewhere, Kieran Marmion scored the only try of the game at the Sportsground last night to help Connacht beat leinster by 10-9 and continue their winning start to the season and put them top of the table.
In the Pro 12 today, The Dragons will host the Glasgow Warriors at Rodney Parade from 2:40.
And the evening kick-off will see Treviso travel to play the Scarlets from 6pm.
