At the other end of the table, Tonna gave their survival hopes a massive boost with a thrilling 23-22 win at Kidwelly to move three points clear of Maesteg Quins and Seven Sisters in the relegation zone.
In ASDA League Three West, Trimsaran and Pembroke Dock Quins both did their chances of staying up a power of good with important wins at Laugharne 18-17 and Haverfordwest 24-5 respectively to leave Pontarddulais adrift at the foot of the table.
Heol y Cyw maintained their iron grip on ASDA League Three South West with a 37-10 win over Amman United, their tenth of the campaign, while Mumbles kept up their push following an impressive 27-0 victory at Banwen.
There was nothing to separate the top two sides in ASDA League Four West where leaders Llanbydder were held to a nail-biting 3-3 draw at Llandeilo.
Llantwit Major beat Abercrave 17-15, while Ystalyfera surprised Pontycymmer 17-7 in the only games in ASDA League Four South West while ASDA League Five West Tycroes continued their unbeaten run, 24-7 against Cefneithin.