Waunarlwydd gave their survival hopes a major boost after winning the basement battle against Dunvant at Roseland Road...
Full-back Rhys Williams proved a match winner, scoring the only try of the game and kicking two penalties to seal an 11-3 win that took Waunarlwydd three points clear of their opponents and six-points above west division bottom side Builth Wells.
A relieved Waunarlwydd coach Rhodri Williams said: "It wasn't a pretty game by any means but this game was all about the result.
"It's hard to describe the significance of the result, not only was it a local derby, but the pressure was really on. It's a dog fight down at the bottom of the league and the boys showed real character to get the win, out defensive effort was massive.
"It would be massive to hold out this season and stay up at this level so this win was really important to pull away from the bottom two."
However the bottom three sides are still adrift of nearest rivals Whitland who secured a 28-19 win at Llangennech with a powerful second-half display.
Phil Morgan, Dion Thomas and Aled Evans all went over while fly-half Aled Davies kicked two conversions and thee penalties.
West leaders Cwmllynfell stayed in pole position courtesy of a 29-17 win over Merthyr thanks to tries from Paul Skilton, Andrew Luther, Shaun Flyman and a penalty try. Peter Thomas converted three of those tries and added a penalty.
Cwmllynfell remain just a point ahead of Bonymaen who had to rely on six penalties from the trusty boot of outside-half Craig Jones to overcome Narberth for whom Nick Jones scored the game's only try.
Narberth are level on points with Carmarthen Quins and Bridgend Athletic who also registered wins at Loughor and Builth Wells respectively.
Newbridge moved three points clear at the top of the East Division after running in five tries against Newport Saracens at the Welfare
Ground. Robert Smith crossed twice before Kristian Perry and Stuart Smith followed as well as being awarded a penalty try in the 37-17.
Their win was compounded by defeat for Uwic who let slip a commanding first-half lead at Beddau. The students raced into a surprise 20-3 lead by half-time through tries from Charles Barkley and Matt Trowbridge and 16 points from the boot of Scott Sneddon.
But Beddau produced a stirring second-half comeback wiith 24 points thanks to a brace of tries from Chris Bundy and a score by Owen Thomas as well as the accurate kicking of Steve Robinson.
Whenever Bedlinog tackle Penallta a massive fixure is guaranteed but this Sunday there will be even more emphasis placed on the two rivals when they contest the SSE Swalec Plate final at Principality Stadium.
Ahead of their SSE SWALEC Bowl Final clash with Taffs Well at Principality Stadium on Sunday, Burry Port share their #FABXV nomination with WRUTV in the search for Welsh rugby's greatest volunteers. Everyone can get involved by sending nominations via twitter to @WRU_Community using the hashtag #FABXV
Cardiff Blues prop Gethin Jenkins and Ospreys centre Ben John look ahead to the first game at Principality Stadium in Saturday's double header which is promising to be a special occasion for all Welsh fans.
Carmarthen Quins Director of Rugby Ian Jones and committee member Jeff Thomas along with Llandovery chairman Handel Davies look ahead to Sunday's SSE SWALEC Cup showdown where both teams are out to prove 'West is best'
SWALEC ambassador Shane WIlliams is looking forward to Sunday's Finals Day where the Cup, Bowl and Plate offers a great opportunity for players and teams to experience the magic of playing at Principality Stadium
Carmarthen Quins coach Richard Kelly believes it is an exciting time to be part of the Scarlets region as his side take on local rivals Llandovery in the SSE Swalec Cup final on Sunday, as WRU TV's Graeme Gillespie discovers