Waste sets and filling
Without a waste set, a bathtub would not be of service to you. This technical detail is the only part that makes a bathtub a functional, long-lasting product.
You can add a waste set with overflow controlled by a Bowden cable or the ClickClack principle to your bathtub. Both are available with or without overflow filling.
All the variants you may need
Waste sets for RAVAK bathtubs include any solutions that you may find useful, including special waste sets with overflow filling.