| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Olsson, Kian J (11)
|
MRNDAC |
1:13.39 |
1:11.78 |
-1.61 |
| 2 |
Daniels, Owen D (12)
|
MRNDAC |
1:20.35 |
1:11.97 |
-8.38 |
| 3 |
White, Ronan W (12)
|
MRPATS |
1:14.76 |
1:14.87 |
0.11 |
| 4 |
Speare, Troy D (11)
|
MRNDAC |
1:14.73 |
1:16.35 |
1.62 |
| 5 |
Cooper, Jackson C (12)
|
MRNBS |
1:19.35 |
1:17.86 |
-1.49 |
| 6 |
Mummery, John F (12)
|
MRNBS |
1:23.07 |
1:22.13 |
-0.94 |
| 7 |
Harty, Liam (11)
|
MRLIE |
1:19.43 |
1:22.64 |
3.21 |
| 8 |
Pagano, Jax A (12)
|
MRNBS |
|
1:22.81 |
- |
| 9 |
Avni, Lucas B (11)
|
MRLIE |
1:35.00 |
1:24.62 |
-10.38 |
| 10 |
Burgarelli, Sebastian (12)
|
MRNBS |
1:25.90 |
1:25.11 |
-0.79 |
|
Constancio, Markus A (12)
|
MRNBS |
2:03.31 |
DQ |
- |