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.
Angus O'Brien has quickly settled into the Wales Sevens squad after solid performances in Hong Kong and Japan. With two rounds remaining in Glasgow and Twickenham on the World Series, WRU TV's Graeme Gillespie chats to the rising star.
Wales winger Luke Morgan has established himself as one of the deadliest finishers on the Sevens World Series. WRU TV's Graeme Gillespie catches up with him on the eve of this weekend's round in Glasgow.
All roads lead to Cardiff on Sunday for the SSE SWALEC Finals Day at the Millennium Stadium. Cambrian Welfare tackle Ystradgynlais in the Bowl final, Ystrad Rhondda play Newcastle Emlyn in the Plate final while defending champions Pontypridd face Bridgend in the Cup final.
WRU Chief Executive Roger Lewis, Deputy Minister for Culture, Sport and Tourism Ken Skates and WRU Chairman Gareth Davies earlier this week launched a new competition in conjunction with the WRU unveiling its archive room.
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.