Heat 6
dimanche 23 juillet 2017, 09h48 GMT – 09h48 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  David McKeon | Australia | 3′ 45.56″ |
| 2 | Tae-Hwan Park | Korea | + 0.01″ |
| 3 |  Mack Horton | Australia | + 0.04″ |
| 4 |  Gabriele Detti | Italy | + 0.16″ |
| 5 | Henrik Christiansen | Norway | + 1.4″ |
| 6 | Aleksandr Krasnykh | Russia | + 1.79″ |
| 7 | Filip Zaborowski | Poland | + 1.91″ |
| 8 |  Poul Zellmann | Germany | + 5.32″ |
| 9 | Ziao Qiu | China | + 6.38″ |
| 10 |  Maarten Brzoskowski | Netherlands | + 7.61″ |