<p>Jacketed pipe is formed as a profile (4) with a main wall (6) tensioned with hydrant parts (15, 37) using clamping elements (36) interacting with the hydrant parts. Independent claims are also included for the following: (1) Hydrant (3) with the above jacketed pipe profile; and (2) Hydrant system with the jacketed pipe and hydrant parts. Preferred Features: The main wall of the jacketed pipe partially surrounds an inner chamber (5) and comprises tensioning pipes (8) partially enclosed by secondary walls (7) and spatially isolated from the inner chamber.</p>
