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.
Welsh players and management joined Deputy Minister for Sport Ken Skates at the Pierhead Building, Cardiff Bay earlier this week to reveal the Union's pioneering school-club hub initiative has been so successful the project will now almost double the scale of the original project.
The Scarlets, Newport Gwent Dragons, Cardiff Blues and the Ospreys look ahead to Judgement Day III which sees the Blues take on the Ospreys (2.30) and the Dragons tackle the Scarlets (4.45pm) at the Millennium Stadium tomorrow afternoon.
Ystradgynlais and Ynysddu played out a titanic struggle at Taffs Well in the SSE SWALEC Bowl semi-final. At the end of the game neither team could be separated after a 15-15 stalemate but Ystradgynlais go through on try count.
Blues strike first in JD III battle - Newport Gwent Dragons lock Andrew Coombs, WRU referee Dylan Llyr Jones and Cardiff Blues hooker Matthew Rees decide dressing room allocations for Judgement Day III
Wales Under 18 captain Calum Haggett has received a conditional offer to read Biomedical Science at St Anne's College, Oxford. WRU chairman Gareth Davies went to meet Calum and Coleg y Cymoedd Principal Judith Evans to wish him luck in his exams and pass on some of his personal experience.
Dodgy tattoos, carthorses, Avatar and soft chins are revealed by Wales Sevens players Tom Williams and Sam Cross as they profile the Wales Sevens squad taking part in Hong Kong this weekend in the latest round of the HSBC Sevens World Series.