Clarrie Dunbar completed a hat-trick of national knockout competition wins over local rivals Purnell last week.
The closest encounter came in the ladies' Yetton Trophy, in which Purnell took the early initiative to lead 42-31 after ten ends.
However, Clarrie fought back over the next five ends to edge ahead and eventually triumphed 85-73, winning both home rinks and one away.
Clarrie's ladies will play Thornbury in the next round on November 29.
In the Denny Cup, the men's national knockout competition, Clarrie won three of the four rinks to beat Purnell 109-45 on Saturday.
Andy Colebrooke and Keith Bailey were emphatic victors at home, with the former winning his rink 45-1, while Fred Pope's rink triumphed 20-14 on the road to extend the lead.
Clarrie face Bristol in the next round on November 17.
Clarrie completed the trio of wins over Purnell with a 115-54 success in the mixed Egham Trophy on Sunday.
Again the win was built on fine home performances, with Russell Francis and Bailey picking up victories by 20 and 21 shots respectively.
Graham Shadwell and Colebrooke's fours added a further 20 shots between them at Purnell.
Clarrie will play Clevedon in the next round on November 25.
This weekend, Clarrie's men open their Somerset League Division 1 campaign with a match against Yeovil on Sunday.
On Saturday, seven Clarrie players will feature in the Somerset side that take on Wiltshire at North Wilts Indoor Bowling Club in the Liberty Trophy.
Francis, Shadwell, Colebrooke and Terry Perkins will skip four of the six rinks, while Craig Doughty, Bailey and Steve Wiltshire are also in the line-up as Somerset start their bid to reach the final for the third year running.
For more information on Clarrie Dunbar Indoor Bowls Club or learning to play the sport, visit www.clarrie.co.uk or call 01373 830092.