Chris Malone was the hero of the away support as he landed a 25 metre drop goal in the sixth minute of injury time to secure the points that took his side one point clear of Sale with one round of matches to go.
However, the celebrations were somewhat muted by the news that Matt Stevens may have a Posterior Cruciate Ligament injury which could rule him out of Bath's final Premiership match of the season. There were also concerns over Zak Feaunati (knee) and Matt Perry (back) who were also forced from the field.
Bath Rugby started brightly and Frikkie Welsh scored in the corner to break the deadlock after just seven minutes. Olly Barkley, assuming the kicking duties, stroked over the touchline conversion to give the visitors the perfect start.
Irish fought back, but Malone kept Bath ticking over with a drop goal before Zak Feaunati's second half try stretched the lead further. Barry Everitt chipped away with two penalties to give Irish a two point lead heading into injury time, before Malone added his second drop goal to secure the victory.