Hydrotherapy apparatus and ducting therefor

Hydrotherapy apparatus for bubbling air outwardly into the water of a hydrotherapy pool from a multiplicity of round air discharge perforations, said apparatus comprising ducting of keyhole shape in cross section and including a cylindrical portion opening radially into a slot-like portion having a bottom formed by a cross wall, said ducting being adapted to be embedded in cementitious material except for said cross wall which is left exposed and generally flush with a submerged interior surface of the hydrotherapy pool walls and with the remainder of said ducting permanently embedded in said cementitious material, said cross wall of said slot-like portion of said ducting being imperforate when installed and being thereafter provided with a multiplicity of round air discharge perforations for dispersing bubbles of air outwardly into the pool water, said ducting being closed except for said air discharge perforations and in communication with a source of pressurized air via duct means opening into a midlength portion of said air dispensing ducting and having a portion thereof located above the water level in said pool, and a portion of said air dispensing ducting being embedded in the bottom wall of said pool and another portion thereof being embedded in a seat portion of the pool wall.