Final Water Connections & Seat Mounting

What happens here

Re-attach the toilet's original supply line to the bottom of the newly installed T-valve. Hand-tighten it until it clicks, ensuring a secure connection. Then, take the bidet seat's supply line (connected in the previous step) and connect it to the side port of the T-valve, hand-tightening it first and then using pliers for no more than a full turn to prevent over-tightening. Once all water connections are secure, carefully slide the bidet seat onto the mounting plate until it clicks firmly into place. Remove any protective plastic wrapping from the bidet seat.

Goal: Connect the toilet's original supply line to the T-valve, then connect the bidet seat's supply line to the T-valve, and finally slide the bidet seat onto the mounting bracket.