Preparation/Assembly 1 Make sure there is a Ø35-Ø40 Hole on the basin before fix the mixer, Unscrew the fitting ASSY from the bottom of the body, then get the body through the hole, don't forget to fix the o-ring between the bottom of the body and the basin. Ø35-Ø40Max 2 According the remove step to screw up the fixing set to the mixer below the basin. 3 Use hand to screw up the locknut, then use nstall tool for fixing strengthen.