Rennie came close to upsetting an understrength Katunga outfit, but Aimee Sidebottom’s side showed enough resolve to finish the job.
Taking the game by just two goals, Rachel Crowther and Elise Newman were absent from the Swans’ line-up.
Sidebottom said learning to play with two different players meant Katunga took a while to make its mark on the game.
‘‘We had a few fill-ins, which was a bit unsettling... I feel like we were lucky we escaped over the line,’’ she said.
Going goal-for-goal in the final quarter there was enough experience in the side to help keep the Swans cool under pressure.
Rachael Howden’s effort in wing attack and Rachelle Moon’s in goal keeper continued to keep the side marginally ahead.
With Howden taking off last year from playing to secure her A-grade umpiring badge, Sidebottom said it made a big difference to have the midcourt ace back in.
‘‘She’s very steady and a smart player, I suppose she’s been around it for long enough, she’s level headed,’’ Sidebottom said.
But despite gathering the win the coach was eager to move on from Saturday’s match in preparation for Dookie United.
Tungamah continues to remain in the mix for a finals berth having defeated Katamatite by 16 goals, with the Bears helped by Dookie United, which defeated Katandra by 18 goals.
The two results mean Tungamah is just a game behind the fifth-placed Kats, who have struggled for consistency this season.
Top side Waaia defeated premiership contender Shepparton East by 15 goals in the final match of the round.
●In north-west matches, Tocumwal again found a way to win, defeating Blighty by two goals, with the Deni Rovers and Strathmerton also victorious.