Loughor went two better, crossing six times during a 51-13 triumph against Penclawdd.
But it is Builth Wells who remain top after beating fourth-place Waunarlwydd 17-12.
Aberystwyth thrashed bottom side Amman United 48-0 in Division Three West, but still trail Pontyberem by ten points at the top of the table. Ponty won 36-24 at home to Llanybydder.
Newcastle Emlyn won narrowly at Lampeter Town, coming away from Ceredigion with a 26-24 victory.
With Brynamman's match against Burry Port postponed, Llandelio extended their lead at the top of Division Four West with a 24-0 win over Pembroke Dock Harlequins.
Division Five West leaders Cefneithin drew 15-15 at third-place Milford Haven.
Furnace United failed to capitalise on that result, and stay in second after they lost 29-0 at Fishguard and Goodwick.
Penlan picked up a bonus point at Tregaron, notching seven tries in a 44-25 victory to stay top of Division Six West.
Pontrhydyfen jump from fourth to second after scoring seven tries of their own in a 48-13 win at Aberavon Naval.