A bubble-generating apparatus comprises: a casing defining a casing bore extending longitudinally therethrough; and a diffuser located in the casing bore, the diffuser defining a diffuser bore extending longitudinally therethrough. The diffuser bore comprises a fluid-input region at or near a fluid-input end of the diffuser and a fluid-output region at or near a fluid-output end of the diffuser. A cross-sectional area of the diffuser bore in the fluid-input region is greater than the cross-sectional area of the diffuser bore in the fluid-output region. At least a portion of the diffuser is porous for permitting a flow of pressurized gas from a region of the casing bore located outside of the diffuser bore, through the porous portion of the diffuser and into the diffuser bore.

Systems, apparatus and methods for providing air and water to hot tub jets. The present teachings include jet assemblies, manifold assemblies, and related components, as well as methods of assembling hot tubs involving these components. In some cases, the present teachings describe the use of dual extrusion tubing to route air and water through adjacent, connected fluid conduits. In some cases, the present teachings describe a press-and-click method of connecting various components.

This disclosure relates generally to jets for spas and, more specifically, to jets that can have more than one jet hydrotherapy spray mode. The jet can include a selectively rotatable jet head, the jet head having a first jet spray mode and a second jet spray mode. The jet head includes a valve, the valve having a first water inlet and a second water inlet, the valve further comprising a first air channel and a second air channel. The valve is rotatable from a first jet spray mode position in which a water intake is in fluid communication with the first water inlet and an air intake is in fluid communication with the first air channel, to a second jet spray mode position in which the water intake is in fluid communication with the second water inlet and the air intake is in fluid communication with the second air channel.

Systems, apparatus and methods for providing air and water to hot tub jets. The present teachings include jet assemblies, manifold assemblies, and related components, as well as methods of assembling hot tubs involving these components. In some cases, the present teachings describe the use of dual extrusion tubing to route air and water through adjacent, connected fluid conduits. In some cases, the present teachings describe a press-and-click method of connecting various components.

Systems, apparatus and methods for providing air and water to hot tub jets. The present teachings include jet assemblies, manifold assemblies, and related components, as well as methods of assembling hot tubs involving these components. In some cases, the present teachings describe the use of dual extrusion tubing to route air and water through adjacent, connected fluid conduits. In some cases, the present teachings describe a press-and-click method of connecting various components.

This disclosure relates to nozzles, in particular bath and shower wands that may be hand held and which generate microbubbles from water saturated with air. The bath and shower wands comprise an elongate body comprising an inlet, an elongate outlet and internal flow constriction that can generate micro bubbles from water passing through the wand.

An aeration nozzle for spraying water infused with air into an above-ground water cavity defined by a wall, comprising a nozzle body having at least a first internal conical portion including an upstream end and a downstream end, the downstream end being smaller than the upstream end, a water way extending through the nozzle body and the first internal conical portion, an air way extending through the nozzle body, the air way intercepting the water way within the nozzle body downstream of the first internal conical portion, and a check valve disposed along the air way that permits air to be pulled through the air way and into the water way by way of a vacuum force caused by water flowing within the water way through the first internal conical portion and prevents water from entering the air way.

A low profile spa jet having a structure allowing for the use of a jet housing for both threaded/nut and grommet installation, wherein the jet protrudes into the spa tub less than 0.5. The low profile spa jet also can have a jet face/flange that is interchangeable between threaded and grommet jet bodies without changing the relationship to the spa wall, wherein the jet protrudes the same amount in the installed state for both styles of jet body. The low profile spa jet also can have a jet face/flange that is removable and/or interchangeable before and after the jet body and jet internal are installed in the spa.

A spa pool is provided including a pool body, the pool body including a pool bottom and a pool wall together defining a water cavity. The spa pool further includes: an inflatable seat defining therein a second air chamber and disposed in the water cavity; a first nozzle assembly, wherein at least a part of the first nozzle assembly is accommodated within the inflatable seat, and a first end of the first nozzle assembly is in fluid communication with the water cavity. The pool body further includes a fluid pipeline disposed in the first air chamber, the fluid pipeline being in fluid communication with a second end of the first nozzle assembly, so that the first nozzle assembly provides fluid communication between the water cavity and the fluid pipeline.

A bath system comprises a tub and a fluid injection system. The tub has a jet orifice, and the fluid injection system is fluidly coupled to the jet orifice. The fluid injection system comprises a conduit, a heat source, an air supply source, and a fluid injector. The conduit has a central opening. The heat source is coupled to an outer portion of the conduit external to the central opening. The air supply source is fluidly coupled to the conduit, and is configured to provide a flow of air to the central opening. The fluid injector is configured to provide an atomized spray of water to the flow of air to produce a combined flow of air and water. The heat source and the conduit are cooperatively configured to heat the combined flow of air and water in the central opening before the combined flow enters the tub through the jet orifice.