It was a tougher game than the score suggests with the visitors battling for every ball.
Cwm from the league above though had a little too much quality and a neat hat trick from Cam Isaac and an own goal and one each for Charlie Davies and Evan Gibbs did the damage.
To be fair Cwm Wanderers fought to the end and scored the best goal of the night with a brilliant lob from Joseff Shaw over the Cwm keeper from a few metres inside the Cwmamman half.
Cwmamman Utd will now hope for another home draw in the next round.