Yes, the units have all the piping included. They have a flexible waste pipe located underneath the tub which must have an ‘inline trap’ fitted to it by your plumber, and he must also use a ‘McAlpine ST28M’ reducing connector to connect it to your current household waste pipe. The pipes to supply the various ancillaries on the unit are all connected to the back of the 3 way valve in the central control panel and not to the tub. These should all be labeled as to which ancillary they should be connected to such as the foot massage, hand shower, steam generator etc, and are all supplied with necessary 15mm connectors with washers in situ.