New signing Peter Stringer came off the bench on his Bath debut to score both tries against Exeter Chiefs at The Rec.
The conversion of a penalty try three minutes from time denied Exeter their first Premiership victory over West Country rivals Bath.
Exeter Chiefs remain unbeaten at Sandy Park this season as they moved up to fifth place in the Premiership with a 30-23 win over Wasps.
Exeter Chiefs suffered a heavy defeat in tonight's Heineken Cup match.
The French side, tipped by many to win the cup, scored six tries.
The Chiefs' only points came from a Gareth Steenson penalty.
The Exeter Chiefs are back in action in Europe tomorrow night in the fifth round of group matches for the Heineken Cup.
After back-to-back victories over Welsh side The Scarlets - The Chiefs are crossing the channel to take on Clermont Auvergne.
Jeff Welch reports:
Exeter Chiefs have been narrowly beaten 18 - 16 by Gloucester in the Premiership.
Simon Alcott scored the only try of the game, but six penalties from Freddie Burns win the game for the Cherry and Whites.
Exeter Chiefs' Luke Arscott has pledged to stay with the club until summer 2015. The full back is a key member of the back line. He was recently linked with Heineken cup rivals Clermont Auvergne but in extending his contract the Plymouth-born player has shown he sees his future at Sandy Park.
Exeter Chiefs were made to work hard by a determined Scarlets team at Sandy Park.
The Chiefs looked in total control after early converted tries from Ian Whitten and Simon Alcott.
But James Hanks' yellow card allowed Scarlets back into the match - with the visitors just seven points behind at the turnaround.
Scott Williams' try at the start of the second half levelled the scores, but the Chiefs won the game thanks to a Gareth Steenson penalty and a last minute James Scaysbrook converted try.
Elsewhere today, the Cornish Pirates won at Swansea by 30 points to 10 in the British and Irish Cup.
Kyle Marriott, Tom Bedford and Rob Elloway scored tries for the visitors.
The Exeter Chiefs have won their first ever game in the Heineken Cup after they beat Scarlets 22-16.
Haydn Thomas crossed the line in the fifth minute, with the rest of the points coming from the boot of Gareth Steenson.
In the British and Irish Cup, Plymouth Albion narrowly won 21-20 at Aberavon, thanks to a 75th minute try from Wayne Sprangle and Paul Roberts' penalty two minutes from the end.
The Cornish Pirates play Swansea tomorrow at the Mennaye Field (2pm).
Plymouth Albion and the Cornish Pirates are both in British and Irish Cup action. Meanwhile in the Heineken Cup, Exeter Chiefs will be hoping their recent run of good form continues, when they make the trip to Wales to take on the Scarlets tomorrow.