Two tries from Robert Smith helped Tredegar to a 29-18 victory over Gilfach Goch, strengthening their grip at the top of Division Two East.
Robert Smith got two tries for Tredegar who are being chased all the way by Bedlinog, they beat Rhydyfelin 14-0 with Geraint Edmunds scoring the only try. Treherbert remain winless this season after losing 18-3 to Abergavenny.
Division Three East leaders Garnffaith made hard work of Pontypool United, eventually coming out 3-0 winners.
The chasing pack were more convincing, Croesyceiliog beat Blaina 19-6, Pill Harriers claimed a 32-6 win over Cwmbran and Nelson defeated Gwernyfed 19-10.
Llantwit Fardre remain unbeaten at the top of Division Three South East after a 15-0 win over second-place Treorchy.
Hooker Ryan Cheshire scored a hat-trick as Aberdare claimed only their second win of the season with a 35-15 thrashing of Llandaff North.
Tries from Paul Rees and Stuart Ornek handed leaders Llandaff a 12-5 win over second-place Nantyglo, putting the away side in a dominant position at the top of Division Four East.
Meanwhile Brynithel picked up only their second win of the campaign, beating St Josephs 13-6 courtesy of a Sion Pita try.
Pentyrch cut the gap between themselves and Division Four South East leaders Heol y Cyw to just one point with a 13-10 win over their rivals. The league now looks like a two horse race after third-place Abercwmboi lost 10-6 away at Tonyrefail.
Division Five East leaders Abercarn lost for the first time this season, going down 18-15 to strugglers Llanhilleth thanks to two tries from Alex Davies.
That result gives second-place Talywain a ray of hope after they won 28-18 away at Usk. Barry remain top of Division Five South East after playing out a thrilling 17-17 draw against nearest rivals Cilfynydd.
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