The prefabricated waterproofing collars KERDI-MV offer reliable waterproofing of pipe penetrations in accordance with DIN 18534 for wet rooms. For added practicality, KERDI-MV comes in different sizes so you can select the collar that suits your pipe diameter:

12 - 30 mm pipe diameter = KMV 9
22 - 40 mm pipe diameter = KMV 15 (add /10 to the end for a pack of 10)
30 - 60 mm pipe diameter = KMV 21
45 - 80 mm pipe diameter = KMV 35
75 - 140 mm pipe diameter = KMV 65
22 - 40 mm pipe diameter = KMV 15 D (double pipe, add /10 to the end for a pack of 10)