Tredegar went level on points with Llantrisant at the top of Dvision 2 after their 29-17 victory at home to Treherbert.
Two tries from Jamie Henthorne and a try each from Damien Smith and Steve Knight ensured a bonus point for The Devils.
Two tries from Jamie Henthorne and a try each from Damien Smith and Steve Knight ensured a bonus point for The Devils. Bedlinog beat Llantrisant 15-9, ending their perfect start to the league season in the process with Ryan James running in two tries for the Foxes at The Rec.
Nelson maintained their grip at the summit of Division Three after a 27-17 win away at Rhymney. The league-leaders were 10-5 behind at the break but managed to run up 22 points in the second-half to overturn the deficit.
Pontypool came up with the shock result of the day with a 42-7 rout at home to third-placed Gwernyfed.
Nantyglo remain top of Division Four after a 21-8 win away at Crumlin. Machen are hot on their heels at the top after a 22-6 victory over Brynithel.
Pontllanfraith remain winless after a 46-3 home defeat to Rhiwbina, with the home side scoring eight tries.
Talywain trounced Caldicot 41-3 in Division Five East, recording a bonus point after six tries.
Blackwood Stars won 24-10 at Crickhowell in the clash of the top two in Division Six East.
Elsewhere in the division, the match between Markham and St Julians HSOB was postponed as St Julians were unable to raise a side.
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