Mark Thomas also provided the Ravens with a try, but the tries from scrum half Aled Davies and centre Nic Reynolds were enough to earn last season’s runner up losing bonus point.
Reigning champions Pontypridd comfortably beat Cross Keys 28-3, but Cardiff started their new season with a crushing home defeat at the hands of Llandovery at the Arms Park.
The 21-year-old Chris Knight stole the show for the visitors, scoring two tries for the as the Drovers ran away with a 48-22 triumph. Other tries for Llandovery came from Lee Rees, Phil Day and Gareth Brookes, while Ruben Tucker crossed twice for Cardiff and Matt Smith got a third.
Bedwas had to come from behind to defeat Camarthen Quins 22-16, while Newport had two-try wing Elliot Frewen to thanks for their 23-20 victory at Aberavon. Neath won their local derby against Swansea 23-9 with tries from Tom James, Dai Langdon and Elliot Jones
