A shower system, a handshower system and a transfer valve assembly. The system may include an adjustable supply assembly fluidly connectable to the water supply pipe, the supply assembly including an adapter defining an axis and having an inlet coupleable to the pipe outlet, a supply member having a supply outlet and coupled in fluid communication with the adapter, the supply member being coupled to the adapter for movement along the axis to adjust a distance between the pipe outlet and the supply outlet, and a seal positioned and operable to provide a sealed connection between the adapter and the supply member in adjusted positions of the supply member relative to the adapter.