Ynysybwl suffered their first defeat of the season in Division Two following their heart-breaking 22-20 loss at Newport Saracens.
Simon Skinner's late penalty ended Bwl's three-match winning run and put them into third place in the table.
David Davies had already grabbed a brace of tries for the home side to add to Mark Bale's strike.
Instead, Llantwit Fardre hit the summit with a gutsy 27-26 victory over Rhydyfelin while Treorchy also leap above Ynysybwl into second spot with a six-try romp over Garndiffaith.
Abergavenny top Division Three after grabbing a five-point victory in their 31-3 home win against Croesyceiliog but Rhymney are hot on their heels following a comprehensive 34-3 bonus-point win over Blaina.
Greg Plant, Matthew Chard, Ioan Lane and Liam Buckley scored the tries to gain maximum points for the home side.
Fly-half Steve Lang grabbed 14 points in an impressive display which included three penalties, a drop goal and conversion.
New Tredegar scored six of the best in Division Four on their way to a comfortable 37-7 win at home to St Josephs.
But home dominance did not sweep the division as Old Illtydians, Risca and Talywain all recorded away wins at Machen, Abertillerty BG and Monmouth.
WRU TV follows Wales' RWC training squad on day one of their camp in North Wales. The squad were greeted to an official welcome in Colwyn Bay and then headed for an afternoon of team building at ZipWorld
Brief highlights from Wales' training camp at the at the world-renowned Aspire Academy in Doha. The heat training will be combined with altitude methods once again with the players sleeping in hypoxic chambers that can replicate up to 4500m above sea level. This compliments the live high, sleep low methods employed in Switzerland.