Trailing 15-3 at the break, the home side delivered 26 unanswered points as AS Montferrand's challenge faded with the sending off of prop Attoub for stamping after a second yellow card.
Olly Barkley led the fightback after a disappointing and sloppy first half with a well worked try in the 54th minute, before Wylie Human showed great skill in touching down over his head for the second score in the corner. Barkley's touchline conversion befitted what was a wonderful try.
With AS Montferrand at the ragged edge, Bath seized the initiative and after fully seven minutes of scrummaging on the opposition line, the home side were awarded a penalty try after the Montferrand front row collapsed the scrum for the umpteenth time. Barkley converted to give his side the lead for the first time
Incredibly, Bath stretched the advantage in the 74th minute when after a catch and drive from Zak Feaunati, replacement Scott Gray touched down in the corner. Again Olly Barkley was on target with the conversion and the comeback was complete.
"I was happy with the result but we were very sloppy in the first half," said Head Coach John Connolly. "However, we tightened things in the second half and played some good rugby at times. We now look forward to the trip to Montferrand."
John was also delighted to see Matt Perry and Robbie Fleck make their first team returns after injury. "I thought that Matt did extremely well. He was tired but looked sharp and we are all pleased for him. Robbie did not see much ball in the closing stages but it is good to have him back."