Jordan Williams kicks a penalty against Llandovery.
Llanelli will play Pontypridd in next Saturday's Premiership final following their derby win over Llandovery at Church Bank.
Anthony Buchanan's side were deserved 29-20 winners but Llandovery remained in it until the final moments.
In the end Llanelli's four tries were enough, Kristian Phillips giving them an early lead with an interception try. Nic Reynolds added a second and scores from Daniel Thomas and Jordan Williams after the break secured the win.
Williams kicked two conversions and a penalty but Llandovery refused to go away, Shaun Miles and Kieran Murphy their scorers.
James Garland converted both tries and kicked two penalties but Llanelli deservedly went through.
It had been a nightmare start for Llandovery, scrum half Rhodri Williams throwing a speculative pass which was intercepted with ease by Phillips. The right winger galloped his way to the line and with Williams adding the conversion, Llanelli led 7-0 with less than a minute on the clock.
An early score gave Llanelli confidence and they were dominant in the early exchanges, full back Dion Jones going close to scoring before being tackled into touch. But despite seeing most of the ball, Llanelli failed to extend their advantage and when Garland replied for the Drovers with a pair of penalties, they were only ahead by one.
In a tight encounter, both sides were guilty of some poor tactical kicking but it was Llandovery who were making more mistakes as they struggled to retain possession. And the visitors took advantage with a second try before the interval.
Reynolds had earlier made a superb break which saw him carve through the Llandovery defence and he was at his attacking best again, powering through to touch down by the posts. Jordan Williams converted but that was not the end of the first half scoring.
Llandovery had been nowhere near their best throughout the first 40 but after Miles crashed over and Garland nailed the difficult touchline conversion, they only trailed by a point at the break.
The half time score was perhaps not representative of Llanelli's dominance as Llandovery failed to click. But when Williams kicked his first penalty of the day at the start of the second half, Llanelli were up and running. Another try soon arrived, Thomas continuing his impressive scoring record following some stylish Llanelli back play. Williams missed the conversion but his side looked well on top.
Despite boasting a comfortable advantage, Llanelli seemed determined to keep their opposition in the game and as they did in the first half, they let Llandovery back into it.
Scarlets' No. 8 Murphy, who is leaving the region at the end of the season, dived over for Llandovery's second try with Garland again converting.
And as the rain lashed down at Church Bank, it was now the home side who were on top. They battered the Llanelli line with wave after wave of pressure but a third score failed to arrive as the red defence held firm.
Indeed Williams could have pushed Llanelli further clear but saw two penalty kicks and a left footed drop goal effort go wide.
It failed to matter though and the Llanelli fly-half made amends for his kicking to seal the win with a late converted try of his own.
How do you follow a dancing hippopotamus - the Ospreys wheelchair rugby team has just the 'oneness' to do it say the BBC! For a decade the sight of a herd of hippos synchronised swimming around their own private blue lagoon, has lit up our television screens at regular intervals between favourite BBC One shows. But now the nation's most watched channel has relinquished its famous amphibious mammals in favour of a new show-reel which includes the Ospreys wheelchair rugby team.
Treorchy's award-winning secretary Bryan James, Ebbw Vale's Nigel Davies and all four regions on the Principality Welsh Rugby Union Podcast. We look ahead fo Europe with Rob Evans of the Scarlets, Dan Baker of the Ospreys, Ellis Jenkins of the Blues, as well as Nic Cudd and Tom Prydie of the Dragons.
Martyn Phillips has discussed details of the newly published 'Strategy for Welsh Rugby' which puts in black and white terms the plans and direction of the governing body of the national sport in Wales for the next decade.
Nigel Davies is a relieved man after seeing his side secure the last spot for phase two of this season's Principality Premiership with a hard fought victory against Gwent rivals, Cross Keys at Eugene Cross Park on Saturday.
With Ebbw Vale and Cardiff battling for the last top tier spot available in this weekend's crucial round of the Principality Premiership, WRU TV's Graeme Gillespie is joined by South Wales Argus rugby writer Chris Kirwan to preview tomorrow's round of action while GTFM Radio's Ioan Dyer interviews Pontypridd coach Robert Sidoli.
Chief executive Martyn Phillips has highlighted the plans for Wales to become a breeding ground for national and elite club rugby coaches, which are contained in the WRU's 10-year 'Strategy for Welsh Rugby'.
Pontypridd coach Robert Sidoli singles out the pace of his side as a major contributing factor in his team's 31-22 win against Cross Keys at Sardis Road in a thrilling Principality Premiership encounter on New Year's Eve, as GTFM's Ioan Dyer discovers.
Having watched Ebbw Vale get out of jail against Cardiff, WRU Head of Rugby Performance Geraint John tells WRU TV's Liz Jones he is now looking forward to next week's final round of phase one of the Principality Premiership where just one place remains vacant for a top eight spot.
Ebbw Vale head coach Nigel Davies reflects on his side's 23-22 defeat to Bedwas in the Principality Premiership. And as WRU TV's Liz Jones finds out, he is making Saturday's clash against Cardiff a must win otherwise a top eight spot seems out of reach.
It's crunch time in the Principality Premiership as teams chase a top eight spot. WRU TV's Graeme Gillespie chats to WRU Head of Performance Geraint John about the festive fixtures while Cross Keys head coach Greg Woods looks ahead to the Boxing Day clash against arch rivals, Newport.
Andrew Coombs is enjoying his new role as Nelson forwards coach. The former Dragons and Wales lock has big ambitions to become a professional coach but feels it's important to learn the ropes in grassroots rugby and where better than his home club Nelson, with friends and family close to hand.
Students at Brynllywarch Hall School, near Newtown, have transformed their own lives, and are now having a positive impact on others through rugby. The sport has had a life-changing effect on the well-being of the students who are now delivering rugby sessions to local primary schools and playing for a new mixed ability side
Wales and Ospreys back row James King, who came through the North Wales age grade system, nominated North Wales Regional Community Rugby Manager Marc Roberts, in the WRU's 'Diolch' initiative where squad players thanked those who played a part in their rise to the top.
Beating Merthyr has boosted Carmarthen Quins hopes of reaching a top eight spot in the Principality Premiership. Quins captain Haydn Pugh is delighted with his team's progress and is determined that everyone from the Under 6s through to the senior team, enjoys the ride.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
Girls in North Wales have two great rugby role models in WRU Regional Coordinator Rachel Taylor and Rhyl High School Hub Officer Ale Lewis, both helping to increase opportunities for women and girls in Welsh rugby.
Aberavon head coach Jason Hyatt is confident his side have what it takes to step up another level ready for the Principality Premiership Tier One when the league kicks off again at the start of next month.
Following a four year suspension to Kurt Clabby of Bedwas and Nelson for evading, refusing or failing to submit a sample collection, announced today, the Welsh Rugby Union has reiterated its call for players to 'Stay Onside'.