Largest league crowd of season sees home defeat.
Romulus ended their losing streak with a convincing victory.
Romulus took the lead after 29 minutes after a long range effort from Todd Evans beat Curtis Pond.
After striking the crossbar within minutes the visitors extended their lead in the 34th minute with Ricky Hill heading home from a corner.
Mark Branch was a whisker away from a third with a free kick from distance that was spectacularly palmed away by Pond from just under his crossbar.
Just eight minutes after the restart Roms raced into a 3.0 lead with a superb curling shot from Yohan Rutty-Smith that nestled in the bottom corner.
Chasetown offered little. Their best chance fell to Michael Wright whose shot was blocked by Cameron Lee and then Ryan Wynter headed over the bar.