Llantrisant remain top of Division Two East after beatings Fleur de Lys by a 21 point margin.
Gavin Groves, Jonathan Williams and Ian Worgan ran in three tries for the league leaders in a 28-7 victory.
Tredegar jumped to second in the table after routing Mountain Ash 28-0 away from home.
All the scoring came in the second half with the visitors notching a bonus point through their four tries, two of which came from Jamie Henthorne.
The other two teams making up the top four, Gilfach Goch and Brynmawr, drew 10-10 in their clash at Welfare Park.
Bedlinog were another side who picked up a bonus point win, crossing five times in a 36-12 win at Treherbert.
Elsewhere Ynysybwl beat Abergavenny 17-12 and Abercynon won 23-8 at Rhydyfelin.
New Tredegar picked up their first win of the season in Division Three East, beating local rivals Rhymney 18-6.
Two second half tries from Dewi Winstone and Steve Osbourn were enough to lift the home side off the bottom of the table.
They rise above Abertillery Blaenau Gwent, who were defeated 22-11 by leaders Nelson, and Cwmbran, who lost 32-25 at Gwernyfed.
In a battle of the bottom two in Division Four East Risca thrashed Pontllanfraith 35-0, picking up their first league win of the season and with it their fifth bonus point.
The local derby between Rhiwbina and St Joseph's was won 10-3 by the hosts, with Danny Hobbs scoring the winning try for the Squirrels.
Centre Andy Farrell lived up to his famous name as he scored two of Usk's four tries in their 28-21 win over RTB Ebbw Vale in Division Five East.
Trinant clinched a losing bonus point as they came back from a 17-0 half-time deficit against Talywain, narrowing the scoreline to 17-13 by the end.
Callum Jones and Leon Probert crossed for Talywain in the first period.
Hartirdge made it two wins in two games in Division Six East, beating the morning leaders Crickhowell 26-6.
Blackwood Stars capitalised on Crickhowell's defeat by beating Markham, who started the day second in the table, 22-10 to take top spot on try difference.
WRU TV were on hand at the launch of a major new commercial deal with WRU and Mercedes-Benz South Wales (part of the Sinclair Group), which sees the family company become an official supplier to the Welsh Rugby Union
On the back of the recent Women's Rugby World Cup, the WRU has launched a revitalised Women's and Girls domestic seasonal structure, and the future is looking bright.
Go to www.wru.co.uk/tryourgame for more information
Roger Lewis talks to WRU TV at the announcement of a new £60 million Rugby Services Agreement (RSA) which provides a new and positive contractual relationship between the WRU and its four Regions for the next six years has been agreed.
The Welsh Rugby Union has announced a major new sponsorship deal with Gullivers Sports Travel which will make the UK's leading, and longest established, multi-sport tour operator, an Official Supplier for the rest of the decade.
Having taken part in seven World Cups as a player and coach, Liza Burgess hopes to go out in style this afternoon when Wales take on Australia in the Play-off for seventh and eighth place in the Women's Rugby World Cup in Paris.