Connect Refill Tube and Adjust Water Level

What happens here

Attach the refill tube to the top of the new fill valve. The blue clip on the refill tube helps slow the flow of water; the presenter notes he rarely uses this feature. Insert the free end of the refill tube into the overflow tube, using the included clip to secure it to the side of the overflow tube. Turn the main water supply back on and allow the tank to fill. Once the tank is full, observe the water level. To fine-tune the water level, twist the small screw on the top of the fill valve. Turning it clockwise will increase the water level, and counter-clockwise will decrease it. If a larger adjustment is needed, lift the blue clip on the fill valve shaft, manually slide the shaft up or down, and then re-secure the clip. After making adjustments, flush the toilet to check the new water level and confirm proper flushing action. The presenter also demonstrates cutting the refill tube to the correct length if it is too long, using wire strippers.

Goal: Connect the refill tube and make final adjustments to the toilet's water level and refilling volume.