Aberavon may have won the Welsh National League Division One title for the last two seasons, but they will remain in the division against next season.
Caerphilly, having won the first leg of the play-off match by 17-13 at Aberavon, set about taming the Wizards and ran in six tries in their second leg success at Virginia Park.
The 49-14 win gave Caerphilly an overall aggregate of 66-27 and fly half Luke Richards led the way with 24 points from a try, five conversions and a hat-trick of penalty goals.
Other tries for Caerphilly came from Taunaholo Taufahema, Simon Grainger, Sione Mone Tuipulotu, John Colderley and a penalty try with former Wales full back Matthew Back crossing twice for Aberavon and New Zealander Scott Leighton goaling both tries.
WRU International Skills Coach Jason Strange is a busy man, combining the new role with that of Wales Under 20 attack coach, Ebbw Vale head coach and continuing to teach at Ebbw Fawr Learning Community.
Warren Gatland and Sam Warburton look ahead to this week's crunch RBS 6 Nations tie against France, where the Wales skipper in particular is keen to make his mark, as Paris has proved a bleak place for him in the past.
Following their historic win over England, Wales Under 20 suffered a narrow, 36-34 loss to their Scottish counterparts last weekend, despite outscoring them by five tries to three. Watch the match highlights and reaction.
WRU TV go behind the scenes with the Wales squad as they put the final touches in place ahead of the clash against Scotland at Murrayfield. Follow the squad on their captain's run, the kickers visit to Murrayfield and Neil Jenkins' press conference