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.
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.