But while the Ironmen made it four wins from four outings, their lead at the top of the table was cut by one point as second placed Rumney bagged a bonus point in scoring six tries at home against Rhydyfelin.
There were two tries for flanker Simon Barry in the 42-15 win and centre Paul King, hooker Carl McCowan, Lewis Andrews and outside half Danny Clark got the others. Clark also kicked two penalties and three conversions to end with a match tally of 17 points.
There was a second defeat in a row for Penallta, who followed up their shock home reverse against Heol y Cyw the previous weekend with a 14-10 defeat away at Treorchy. It was a notable first win of the campaign for the home side.
Lock Luke Brennan was the try scoring hero for Treorchy and the rest of the points came from the boot. Gareth Edwards scored Penallta’s lone try and Gareth Wilkes kicked a penalty and conversion.
Heol y Cyw maintained their excellent form on the road as they backed up their big win at Penallta with a 22-15 triumph at Glamorgan Wanderers. The visitors were 15-8 ahead at the break and had a second half try from Matthew Pound to seal the win.
Heol y Cyw had scored two tries in the first half from David Pearson and Kyle Lowry, while the Wanderers responded with tries from Rhys Griffiths and Ray Bishop.
Ynysybwl edged out Nelson 31-30 in a thriller on their own patch. Two tries from centre Sean Ireland were at the heart of a four try onslaught that bagged a vital bonus point for the home side.
Matthew Nuthall and Jonathan Gough scored the other tries and there were a perfect set of four conversions and a penalty from the reliable boot of Nathan Ellis to complete the home scoring.
Ystrad Rhondda also broke their duck with a 29-13 home win over Gilfach Goch. Dai Gratton was among the Ystrad try scorers and there were 19 points from the boot of Rhys Truelove.
