Two goals by former Llanellii Town striker Jordan Follows and another from Stephen Hughes, saw the home side triumph in the final league game of the season between the near neighbours.
In reply, the visitors could only manage to muster one through Ross Jones, but overall they can have few complaints as they were second best for much of the time, seldom testing Mark Snell in the home goal.
The Reds made a number of changes to the starting line-up, with Jack Dale taking over from midfielder Steve Stone in goal, while there were returns by Chris Thomas and Luke Jones, although recent foot surgery excluded Liam Samuel.
Cwmamman got off to a flying start with a goal within the opening two minutes following a pass by Chris Thomas back to Dale, but in attempting to clear, and under pressure from Follows, he got into a terrible tangle and the ball eventually broke goalwards before trundling into the unguarded net.
Follows was then involved again, on this occasion sending a shot across the face of the goal when he was found by Hughes, before the Reds finally managed to put together an attack which culminated in Snell diverting a well struck effort by Bruno Forkuoh around the post.
They had better fortune after 15 minutes when they drew level with Ross Jones being picked out wide on the right by Stone before despatching his finish over Snell into the top corner.
However, their elation was short lived as ten minutes later their opponents regained the lead with Follows getting his brace after a David Brown pass fell into his path, and he beat Dale with a well struck effort into the far corner of the net.
When a long kick by Snell deflected off the head of Reds captain Lee Bevan, Follows was on hand to collect the loose ball, but this time he failed to find the target.
Just before the break, a deep cross by Robert Thomas on the left struck the home bar with Snell scrambling to meet it, but Cwmamman went into the second half with their narrow lead intact.
The visitors made changes during the interval, with Stone replacing Dale in goal and Bartolome Bauza coming on into midfield, and the stand-in keeper was soon in action, doing well to keep out a strike by Ashley Curtis.
When the visitors broke, Jamie Evans curled an attempt just wide of the home goal, while his free kick was smothered on the line by Snell.
Another Reds move led to Richard Lewis delivering a ball across the area which just failed to pick out Bauza, while at the other end a move involving Craig Spring and Hughes saw the latter send his finish inches past the far upright.
When Cwmamman were awarded a free kick on the edge of the box, Brown drove it goalwards where Stone managed to divert it clear but only as Hughes who promptly netted, but an offside flag cancelled this out.
This proved to be a temporary setback, as the home side struck again on 70 minutes with Hughes meeting a well flighted cross into the area and head over Stone.
With the contest slipping away from them, the Reds pushed forward and went close to reducing the deficit when a Lewis free kick into the goalmouth was cleared as far as Bauza whose shot was blocked on the line before Evans met the rebound, but his goalbound header was also scrambled away.
Brown sent another set piece just wide, but at the final whistle the home side ran out worthy winners, although both teams can take credit by finishing in respectable final positions in the table, with Cwmamman in sixth place and the Reds in seventh.
CWMAMMAN UNITED; Snell; Johns; John; Medwin; McNeil ©; Spring; Soroka; Hughes;
Curtis (Matthews, 90); Follows (Saunders, 73); Brown; Subs. not used;
Lloyd Evans; Rees; Jones (GK).
LLANELLI TOWN; Dale (Stone, 46);, (Bauza, 46); Napieralla; Lewis; C. Thomas; Bevan ©;
R. Jones; R. Thomas; Evans; Forkuoh (Hughes, 64); L. Jones (Zola, 88);
Subs. not used; Holmes; Martin.
SCORERS; Cwmamman United – Follows, 2, 25; Hughes, 70.
Llanelli Town – R. Jones, 15.
YELLOW CARDS; Cwmamman United – Hughes.
Llanelli Town - Lewis; Bevan; R. Jones.