Fly half James Hook led the Welsh All Blacks to their tenth successive win as he rattled up 27 points from eight converrsions, two penalty goals and one of the nine Neath tries. It took him to the top of the scoring charts with 176 points.
Second-placed Aberavon fell to their second defeat of the season as they crashed 31-13 at Stradey Park against Llanelli, who included internationals Hottie Louw, Mark Jones and Martyn Madden in their starting lineup.
Aberavon fly half Jamie Davies kicked eight points to surpass Neil Jenkins as the third-highest points scorer in Welsh League history. Only the Ebbw Vale pair of Jason Williams and Byron Hayward now stand in front of the 27-year-old Wizard.
Llanelli fly half Ceiron Thomas scored 16 of his side's points and tries came from Geraint Evans, Ryan Hopkins and Dan Gravell.
A special video package as Pontypridd claimed the double for the first time in their history by winning the Principality Premiership final, including match build-up, highlights, post match reaction and dressing room celebrations.