The Clyde Young Shield ladder-leader will have the weekend off to prepare for its premiership tilt after notching all 10 points inside the first day of play on Saturday.
United rolled through Waaia for a remarkable 39 runs in the first innings, before piling on a quick-fire 4-121 in reply, with Travis Gillin's 74-run knock the highlight.
Tasked with reaching 82 runs to make United bat again, Waaia finished all out on 84 from 19.1 overs as United's bowlers wreaked havoc at Princess Park.
United's Travis Frost finished with incredible match figures of 6-31, while Reece Mulvihill (4-17) and Ethan McLaren (3-24) starred alongside him.
The memorable win was sealed after five balls into United's second innings, with Oliver Warburton crunching a boundary.
● Meanwhile, the stage is set for a blockbuster final day of the B-grade season this weekend as four sides look to cement a finals spot.
Tatura is in the box seat to claim victory against Numurkah, with the Blues to resume at 5-60 after James Collett (2-5) and Will Russell (2-9) dominated with the ball.
However, Collett's important half-century at No. 9 may prove to be the difference as he top-scored with 53 runs in Tatura's 174-run total.
● Fellow finals aspirants Northerners and Undera will need a brave batting performance in their respective 223 and 177 run chases.
Old Students reached 8-222 in their clash against Northerners, with Mick Lewis (53 runs) and Harwinder Singh (48) the stars with the willow in hand.
And Euroa's Dion Grant (35 runs) top-scored in his side's innings against Undera.
● Mooroopna recorded a six-wicket win against Central Park, Karramomus leads by 171 runs in its clash with Katandra and Kyabram scored 194 against Pine Lodge.
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