A bathtub plumbing system including a hand-held shower controlled by a compact pressure balanced, volume and temperature controlled mixing valve. The nail includes a body defining a longitudinal axis of the body and an external periphery of the body for fitting in the medullary canal of the long bone. The LED driving circuit also includes a control transistor for controlling the level of the output current. The server computer also notifies a recipient on a platform specified in the triggered rule by the user, using a supplemental alert message.