A fitting assembly for installation in an opening in a tub shell wall of a bathing installation tub. A resilient grommet is sized to be inserted into the opening and has an interior peripheral recess defined in a wall portion, having a recess cross-sectional configuration. A fitting body has a protruding external rib having a rib cross-sectional configuration complimentary to the recess cross-sectional configuration, the rib positioned on the fitting body so that when the fitting body is inserted into the grommet, the rib is received into the recess on the grommet. The grommet and fitting are configured such that the recess and the rib are positioned behind the back surface of the shell wall when installed in the opening, and the grommet is compressed by the edge of the shell opening and pushed outwardly by the rib to lock the fitting into the shell opening.

A device for securing a discharge end of a gas discharge apparatus inside a gas delivery conduit of a fluid impermeable liner covering a liquid-receiving basin features a first portion configured to be supported on the basin so as to engage an outer face of the liner which normally engages the basin and a second portion of the device configured to be movable relative to the first portion to selectively engage an inner face of the liner in opposite relation to the first portion in a working position. The inner face of the liner delimits the interior of the liner-covered basin. The first and second portions are configured to cooperatively form a generally tubular cavity substantially encompassing the gas delivery conduit in the working position, to clamp the gas delivery conduit over the discharge end of the gas discharge apparatus to substantially form a fluidic seal therebetween.

Systems and methods for nitric oxide (NO) generation systems are provided. In some embodiments, an NO generation system comprises at least one pair of electrodes configured to generate a product gas containing NO from a flow of a reactant gas. The electrodes have elongated surfaces such that a plasma produced is carried by the flow of the reactant gas and glides along the elongated surfaces from a first end towards a second end of the electrode pair. A controller is configured to regulate the amount of NO in the product gas by the at least one pair of electrodes using one or more parameters as an input to the controller. The one or more parameters include information from a plurality of sensors configured to collect information relating to at least one of the reactant gas, the product gas, and a medical gas into which the product gas flows.

The present disclosure discloses an air passage unit for a massaging pool. The air passage unit comprises an air passing portion, a first air connecting portion, and a first fastening structure. The first air connecting portion comprises two first air connecting openings configured to be in communication with the air passing portion, the first fastening structure is configured to be detachably connected to the massaging pool, and the two first air connecting openings are disposed on the first fastening structure so as to enable the two first air connecting openings to be synchronously connected to or detached from the massaging pool through the first fastening structure being connected to or detached from the massaging pool. The present disclosure further discloses an air passage system for a massaging pool. The air passage system comprises an air pump, and an air passage unit. The air passage unit comprises an air passing portion, a first air connecting portion, and a control mechanism. The air passage unit is configured to be alternatively in an inflated state or an exhausted state. When the air passage unit is in the inflated state, a first passing passage is in communication with external air, and a second air passing passage is in communication with the first air connecting portion. When the air passage unit is in the exhausted state, the first air connecting portion is in communication with the first air passing passage through the control mechanism, and the second air passing passage is in communication with the external air through the control mechanism.

Systems and methods for nitric oxide (NO) generation systems are provided. In some embodiments, an NO generation system comprises at least one pair of electrodes configured to generate a product gas containing NO from a flow of a reactant gas. The electrodes have elongated surfaces such that a plasma produced is carried by the flow of the reactant gas and glides along the elongated surfaces from a first end towards a second end of the electrode pair. A controller is configured to regulate the amount of NO in the product gas by the at least one pair of electrodes using one or more parameters as an input to the controller. The one or more parameters include information from a plurality of sensors configured to collect information relating to at least one of the reactant gas, the product gas, and a medical gas into which the product gas flows.

A bathtub, including a bathtub body and a cover body provided at the internal bottom surface of the bathtub body, wherein a water passing gap is provided between the cover body and the internal bottom surface of the bathtub body. The bathtub further includes: a water discharging component, wherein the water discharging opening of the water discharging component is covered by the cover body, and water in the bathtub body flows into the water discharging opening via the water passing gap for water discharging; and/or a water inlet component, wherein the water of the water inlet component is covered by the cover body, and water flows from the water inlet into the bathtub body via the water passing gap.

A lift system for a spa cover includes a first lift assembly configured for coupling to a first side of a spa, the first lift assembly including a motor and a first lever arm, the first lever arm having a first end configured for driving connection to the motor, and a second end configured for operative connection to a spa cover, and a clutch assembly configured to transmit torque from the motor to the first lever arm, the clutch assembly including a drive plate rotatably driven by the motor, a clutch plate arranged parallel to the drive plate, and a plurality of projections extending from one of the drive plate and the clutch plate and being configured to engage a corresponding plurality of recesses in the other of the drive plate and the clutch plate.

A liner for use with a basin to contain a liquid features a plurality of bodies of flexible plastic. Portions of an inner face of a first body of flexible plastic are joined to corresponding portions of an inner face of a second body of flexible plastic, through which a plurality of openings are formed, to provide a multi-layer body of flexible plastic. Other portions of the inner face of the first body of flexible plastic are not joined to corresponding other portions of the inner face of the second body of flexible plastic, defining an air conduit between the first body of flexible plastic and the second body of flexible plastic for guiding pressurized air substantially from an air discharge apparatus.

A liner for use with a basin to contain a liquid features a plurality of bodies of flexible plastic. Portions of an inner face of a first body of flexible plastic are joined to corresponding portions of an inner face of a second body of flexible plastic, through which a plurality of openings are formed, to provide a multi-layer body of flexible plastic. Other portions of the inner face of the first body of flexible plastic are not joined to corresponding other portions of the inner face of the second body of flexible plastic, defining an air conduit between the first body of flexible plastic and the second body of flexible plastic for guiding pressurized air substantially from an air discharge apparatus.

An inflatable pool includes a pool wall and a pool bottom which define a fluid accommodation cavity. The pool wall includes an inflatable chamber, and the pool bottom includes an outer bottom sheet and an inner bottom sheet. The inflatable pool further includes a wave-making channel arranged at the pool bottom and formed by enclosing strip strip connected to the inner bottom sheet and the outer bottom sheet respectively. The inner bottom sheet includes an inner annular rim connected to the outer bottom sheet to form the annular wave-making channel, and an outer annular rim of the inner bottom sheet is connected to the strip to form an overlapping region. Holes are formed through the overlapping region, and the wave-making channel is in fluid communication with the fluid accommodation cavity via the holes.