Mawr thwart Ponty effort.
The match of the day in Division Two (West) saw Tonmawr win 36-19 at Pontyberem to maintain their undefeated record.
The tries came from Darren Griffiths (2), Gareth Morris, Robert Hill, James Donovan and Austin Howells, who notched three conversions, while Ponty picked up tries from Phil Rowe (2) and Mark Jones, to go with two conversions from Justin Lloyd.
Table-topping Corus won 33-3 against Maesteg Quins with tries by Adam Daws and Dean Scully with outside half Rhodri Lewis grabbing three tries and four conversions.
Carmarthen Athletic beat Felinfoel 36-24 as home tries came from Chris Harries, Vincent Jones (2), Aled Thomas and Rhodri Evans, plus 11 points from Leyton McKenna.
Two Rhys Heath tries helped Gorseinon beat Tonna 48-11 as the visitors' points came from two penalties by Andrew Probert alongside a Ryan Freeman try.
Matthew Stoneham, Owen David, Neil Clapham, Anthony Burder and Darren Wilcox also featured on the Gorseinon scoresheet.
Aberystwyth sit proudly on top of Division Three (West) after a fine 42-7 win at Pembroke Dock Quins as scrum-half Gwyon James directed operations and tries came form Paul Stubbs (2), Elgan Jones, Eifion Jones and Bryn Evans. Gwilym Evans slotted three penalties and four conversions for Aber.
Llangefni went down 26-22 at Laugharne, who had tries by Endaf Howells, Simon Demayne and John Owen, plus a conversion and three penalties from Alistair Chambers.
Haverfordwest beat Newcastle Emlyn 13-8 thanks to a try by Dan Harries alongside three Mike Venables penalties, while skipper Gethin Davies claimed the Emlyn try and Huw Evans kicked a penalty.
Llanybydder maintained top spot in Division Four (West) with a 34-14 win at Neyland, whose tries came from Delme Bateman and Martin Roberts, both converted by Mark Riley.
But first half tries from Craig Jones, Rhys Bowen, Gareth Jones and Carwyn Evans alongside 14 points from Barry Thomas eased Llanybydder through.
Tycroes are runaway leaders of Division Five (West) and beat Pontyates 51-9, while Aberaeron are still second after a 21-20 win over Fishguard through tries by Neil Jones, Dylan Williams and Neil Snowden.