Although not getting the game all to themselves against lowly Banwen, Brian Shenton's side once again proved they are the team to beat as they made it four wins from four with a 41-14 home win.
Dunvant may be hot on their heels with an equally impressive three from three record following their 34-19 home triumph over Mumbles, but it might not be until December 10 when the two teams clash at Broadacre that something gives at the top of the table. Veteran No. 8 Paul Morris and former Swansea stand-off Rob Sweeney were among the Dunvant try scorers and full back Mark Williams bagged 19 points.
Carmarthen Athletic mounted a major second half revival at Tonmawr to overcome a 6-0 deficit and emerge triumphant 8-6. Austin Howells kicked two first-half penalties for the home side before a Chris Harries try and Rhodri Thomas penalty earned the Atheltic the points.
Gorseinon proved far too strong for Seven Sisters on home soil, winning 29-8, while scrum half Craig Thomas grabbed two tries in Kidwelly's 33-6 victory at Pontyberem. Loughor took Bridgend Athletic's unbeaten record with a 34-21 home win that contained tries from Mark Williams, Jason and Daniel Howell and Steve Raikes.
Trimsaran heaped more pressure on bottom of the table Tenby United in League Three West as they ran out 32-0 victors on the road to take over at the top. League leaders Llangefni had their game with Hendy postponed because of their visitors' Konica Minolta Cup commitments, but still remain the only unbeaten team in the division.
However, Haverfordwest also went above them thanks to their 17-7 home victory over Aberystwyth. Laugharne were comfortable 41-7 winners over Amman United, Newcastle Emlyn pipped Lampeter 19-11 and Penclawdd won 26-5 at Tumble.
Pontarddulais won the top of the table clash in League Four West with some ease as they ran out 34-10 winners at previously unbeaten Neyland. Llandeilo also had an impressive away win, 34-10 at New Dock Stars, to join Pontarddulais in retaining their unbeaten tag.
Aberavon Quins continue to lead the pace in League Three South West following their fourth successive victory, 42-29 at home to Cwmgors.
Wales reached their first semi-final since 2013 in the opening round of this season's HSBC World Rugby Sevens Series in Dubai. WRU TV's Graeme Gillespie recaps on what proved to be an eventful tournament
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.
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
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.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
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.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series