The type B slang adapter is designed for the connection of a 38 mm two-way adapter with the plunjerklep of other two-way audio trusting. The adapter is different from 32 mm to a connection from a swimming pool to 38 mm. These slang adapters are available when upgrading a pump system with a maximum of 3.785 L/u) according to a large pump system (minimum 5.678 L/u).