Fourth-placed Valley overcame minor premiers Wests off the back of an inspired all-round performance by evergreen allrounder Andrew Gode while University of Queensland flexed their batting muscles for the second game in a row as all teams had to contend with wet conditions across the weekend.
Gode claimed 7-57 to help dismiss Wests for 129 and enable Valley to defend their first innings total of 155.
Gode, who hit 50, and Jack Beath (52) provided the lions-share of the innings after Wests quick Blake Edwards ripped in to claim 5-36 from 15 overs.
Valley were 5-131 in the second innings, with Lachy Pfeffer 55no. Edwards took 3-60 to give him eight wickets for the match.
University of Queensland batsmen Ben Davis and Nic Sale set up their team's Finals campaign with a dominant batting effort. Davis finished with 147 and Sale produced 77 as University held defending premiers Norths at bay for across the two days. Uni finished 4-341 to confirm their spot in the Final.
It will be a four-day game, played over two weekends.
In the Katherine Raymont Shield, a result was not possible between Wests and Gold Coast due to heavy rain during the afternoon on Sunday that washed out Wests' chase.
Earlier, Tasmanian Tigers and Hobart Hurricanes batter Georgia Redmayne scored a super century for the Gold Coast at Allan Border Field. Redmayne hit 116 off 118 balls as the Dolphins amassed 5-253, with WBBL Brisbane Heat duo Sammy-Jo Johnson (45) and Delissa Kimmince (40no) also contributing important runs.
The Final will now be replayed at Graceville on Sunday.