Hansgrohe PuraVida 273901 Serie Instrucciones De Montaje / Manejo / Garantía página 6

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Remove the mounting ring.
Drill the screw holes using a  mm bit (1).
3.
Install the anchors (2).
2.
Seal the ceiling around the anchors using waterproof
sealant (3).
1.
6 mm
Install the mounting ring.
Install the screws.