Louise Rickard scored her 32nd try to steer Wales to a third successive championship win, 19-10, in a wind-swept Dublin on Friday.
Non Evans kicked four penalties and a conversion for Wales
It was the Irish who got off to a flyer with two tries from driving line-outs giving them a 10-3 lead after Non Evans had opened Wales' scoring.
Evans then added two more penalties before the break along with converting Rickard's try to make it 16-10.
And she scored the only three points of the second half to secure the win.