(57) In a hydromassage fitting (10) a first sleeve (54), a jet generator mounted on an
orientable spherical body (12) and containing an axially movable nozzle (60),actuated
by an external actuator (82), said nozzle being retracted under the control of said
external actuator (82) to leave a passage space for the jet water, said nozzle (60)
comprining a non return valve (100) adapted to permit the flow of fluids from inside
to outside of the nozzle but not viceversa, thus acting as a check valve to prevent
the backflow of water from a tub served by said fitting (10) to the air pipings of
said fitting, said nozzle (60) cooperating with the sleeve (54) to prevent, in the
extended position, the backflow of water from said tub to water circulation circuits
of said fitting.
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