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 pool or spa system includes networked pool or spa devices that can be dynamically configured with network addresses by a controller. The controller can transmit a device discovery request on a network and can receive a discovery response from pool or spa devices that require a network address. The system determines and assigns the network addresses for the pool or spa devices based on unique device identifiers associated with the responding pool or spa devices. The network addresses assigned to the pool or spa device are transmitted to the pool or spa device to be used by the pool or spa devices to communicate with the controller over the network. The system can be used to discover and assign addresses to various types of pool or spa devices, such as pumps, underwater lights, chlorinators, water feature controllers, remote controllers, and/or other types of devices.

Spa systems may be used all year round and in colder weather provide an enjoyable experience for users through the cold ambient outdoor temperature and the heated water of the spa. However, failures in respect of the water circulating pump and/or heater of the spa system either mechanically, electrically or through overall power outages mean the water in the spa system and its pipework can easily freeze if ambient conditions are cold enough leading to cracks in the spa system or pipes and hence leaks when the water thaws requiring costly repair or replacement of components or entire systems. Accordingly, a freeze protection system is provided that uses a backup thermal management system discretely or in combination with other backup systems. These freeze protection systems offering backup when mechanical failures, electrical failures etc. arise by providing thermal input to the spa system through alternate thermal paths and providing alarms.

Hot tubs are disclosed herein that include a rigid outer shell having at least two seats formed therein and a footbed below the at least two seats. The at least two seats are either positioned equidistantly from the footbed or at unequal distances from the footbed. The hot tub includes at least two pumps and each pump is configured to pump water to a single seat. The hot tub has an equal number of seats and pumps as well as a skimmer positioned on a sidewall of the rigid shell. The skimmer extends at least one foot in a vertical direction and is configured to supply water to the pumps when a water level in the hot tub is as low as sixteen (16) inches from the footbed and when the water level in the hot tub is at least thirty (30) inches from the footbed.

A walk-in hot tub which can enable one or more users to walk into and out of a hot tub in a dry state may include a hot tub compartment. The hot tub compartment may have a hot tub compartment interior. A tub transfer compartment may be disposed adjacent to the hot tub compartment. The tub transfer compartment may have a transfer compartment interior. An openable transfer compartment door may provide walking access to a user from outside the tub transfer compartment into the transfer compartment interior of the tub transfer compartment. An openable hot tub compartment door may provide walking access to one or more users between the hot tub compartment interior of the hot tub compartment and the transfer compartment interior of the tub transfer compartment.

There is provided a bathtub, including: a bottom surface part; a side surface part surrounding the bottom surface part, extending upward from the bottom surface part, and including a backrest part; a pillow part provided to be movable vertically over a prescribed range along the backrest part; and a water discharger mounted to the pillow part, the water discharger being provided to be movable vertically along the backrest part with the pillow part.

An ice bath having a receptacle section and a temperature control element adjacent thereto and arranged to adjust the temperature of the receptable section. The temperature control element is connected to a refrigeration module that reduces the temperature of the receptacle. The temperature control element is further connected to a heating module that increases the temperature of the receptacle.

A method, apparatus and system to facilitate maintenance of a network enabled bathing unit system. A Graphical User Interface (GUI) is presented providing a user operable control for receiving from a customer a service request requesting that a technician contact the customer. The user operable control may in some cases be enabled in response to detection of an operational error in the bathing unit system and disabled otherwise. In response to receipt of the service request through the user operable control, a notification message indicating that the customer has requested to be contacted by a technician is sent over a communication network. In some embodiments, a message responsive to the service request is received to cause the GUI to present user-selectable options to enable the customer to selectively permit the remote control and monitoring of the bathing unit system by a specific remote service technician.

A jet pump has an impeller with a magnet that can be rotated by a shaft having a magnetic drive plate and wherein the impeller and the magnetic drive plate are separated from one another by at least one solid wall surface. The impeller can be located in a pump housing having a base and a cover. The base can have a surface bearing so that the impeller can contact therewith and rotated against the surface of the surface bearing.

A method and a control panel are described for facilitating the control of a bathing unit system so that the bathing unit system is caused to transition between operating in accordance with a first operational mode to operating in accordance with a second operational mode. A control signal is generated in response to a unitary user input event performed by a user at a control panel of the bathing unit system, the control signal conveying an ambiance activation command associated with a specific ambience setting, the generation of the control signal comprising selecting the specific ambience setting from a set of ambience settings stored in a memory device. The control signal is then transmitted from the control panel to the controller over a communication link where it is processed to cause the bathing unit system to transition from being in the rest mode to operating in accordance with the specific ambience setting. The method and a control panel may allow simplifying the control of the bathing unit system in order to achieve a desired total effect by allowing a user to cause the bathing unit to operate in accordance with an ambience setting by way of a unitary user input event performed at the control panel.