Abstract: An electrolytic cell assembly for connection to a liquid flow line includes an electrode set, a cell housing supporting the electrode set, a cell retainer attached to the flow line and in fluid communication with the flow line, and a connection for detachably connecting the housing to the cell retainer in an operating position.

Abstract: A hydro-therapy spa jet including an inlet connection, a first nozzle to accelerate a water stream from the inlet connection, an air inlet, a second nozzle drawing air from the air inlet to aerate the accelerated water stream, and a third nozzle to slow and directionally adjust the aerated water stream. The third nozzle includes an inlet, a chamber, and an orifice, where the aerated water stream passes into the inlet, through the chamber, and out the orifice. The inlet has a conical inner surface that contracts in a downstream direction. The inlet also includes a spherical outer surface, which is received in a conforming spherical inner surface within the jet. The chamber is conical in shape, expanding in the downstream direction to reduce the water's speed as it passes through the chamber. The orifice defines a passage having a cross-sectional area that is constant in the downstream direction.

Abstract: A hydro-therapy spa jet including an inlet connection, a first nozzle to accelerate a water stream from the inlet connection, an air inlet, a second nozzle drawing air from the air inlet to aerate the accelerated water stream, and a third nozzle to slow and directionally adjust the aerated water stream. The third nozzle includes an inlet, a chamber, and an orifice, where the aerated water stream passes into the inlet, through the chamber, and out the orifice. The inlet has a conical inner surface that contracts in a downstream direction. The inlet also includes a spherical outer surface, which is received in a conforming spherical inner surface within the jet. The chamber is conical in shape, expanding in the downstream direction to reduce the water's speed as it passes through the chamber. The orifice defines a passage having a cross-sectional area that is constant in the downstream direction.

Abstract: A safety cover for mounting upon a suction drain that removes water from a jetted tub or spa. The safety cover can handle a high fluid flow intake rate and has a relatively small size, yet is unlikely to entangle the hair of a user and can pass the industry standard five pound pull test. The safety cover has at least one internal wall that acts as a guide vane thereby advantageously tending to reduce turbulence and vortexing of the water as it passes through the cover and into the suction drain. Because turbulence and vortexing of the water is reduced, the possibility that a user's hair could extend through the cover and become entangled thereunder is likewise reduced. Further, because of the stabilized fluid flow inside the safety cover, the cover can have a size that is smaller than otherwise possible without the anti-vortexing interior wall. The interior wall also can extend from the cover to a supporting base to advantageously increase the structural strength of the cover.