Five North side Denbigh have been playing games away until their new dressing rooms were completed, but now they are ready and the side turned on the heat in their first game changing in their new surroundings.
Fly half Llion Edwards was outstanding with three tries and seven conversions and flanker Noel Spillane also scored three of the ten tries in a 64-10 win.
Bethesda received a setback when they were beaten 12-10 at Rhos; Colwyn Bay held on to win 8-7 at Machynlleth and Bangor defeated Llanidloes 38-12.
South West leaders Resolven beat Baglan 34-0 and Neath Athletic have now joined the clubs battling it out in the basement after slipping to a 29-10 defeat at high-flying Aberavon Green Stars.
West leaders Cefneithen were well beaten 16-0 at Crymych to throw the promotion race wide open. Pembroke's 24-3 win at Furnace and Pontyates 22-3 success against New Dock Stars closed up the gap at the top of this division.
Only three matches were played in South East with Cilfynydd improving their position after winning 24-20 at Ferndale while Llandaff North were impressive at Bridgend Sports, running out 39-0 winners.
The other match went to South Wales Police who beat Deri 27-12. Trinant kept ahead in East after their 17-6 victory over visitors Bettws. Machen stay in contention following a 14-3 success over Usk while Garndiffaith defeated Blaenavon 21-13.
RGC 1404 have celebrated their crowning as Division One East winners, after just one season of competitive rugby. A big crowd turned out to support the clubs 'Celebration Saturday' when they were presented with the SWALEC trophy following their definitive 45-0 home win against Rhydydfelin on 18 May.
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.