(If your T-adapter came with two black washers, use only the FLAT one.)
1. Turn water supply completely off.
2. Empty all water from toilet tank.
3. Unscrew water supply hose.
4. Place flat black washer in T-adapter.
5. Screw T-adapter to toilet tank.
6. Screw water supply hose to T-adapter.
7. Screw Whisper hose to T-adapter.
8. Screw Whisper hose to Whisper.
9. Flip seat caps up.
10. Unscrew seat fastener.
11. Remove toilet seat.
12. Place Whisper on toilet bowl.
13. Place toilet seat on Whisper.
14. Screw seat fastener back on.
15. Close seat caps.
16. Turn water supply on.
17. Test water.