The present invention relates to an extendable container for fluids with variable containment volume and dimensions, which comprises one or more elements independent and capable of relative movement among themselves.

A modular swimming pool with one or more swimming pool modules that each include a floor element, and a wall element connected to the floor element. The swimming pool modules by assembly define an internal pool space. The floor element and the wall element of a swimming pool module have reinforcement ribs and the reinforcement ribs of the wall element extend towards the floor element. The reinforcement ribs are spaced apart from each other and on the external surface form open chambers configured, when resting on a mounting surface, to be completely filled with a binder. The internal pool space in the area of the floor element has a wedge-like recess, forming a continuous duct area of the internal pool space, and the reinforcement ribs of the floor element are connected to an external surface of the recess, which faces away from the duct area, thereby restricting the open chambers.

A pool wall segment for use in a pool wall system may comprise: a first sidewall; a second sidewall disposed opposite the first sidewall, the first sidewall and second sidewall defining a cavity therebetween; and a webbing system disposed between the first sidewall and the second sidewall, the webbing system configured to hold a rebar.

A system and method for providing a hammock for a user to rest thereon in the water of the spa. The hammock may include a proximal end with head support portion and one or more attachment means for connection to an anchor on the spa shell, and a distal end with one or more attachment means for connection to an anchor on the spa shell. One or more lateral coupling members may couple the hammock to the lateral sides of the spa, and one or more longitudinal coupling members may couple the hammock to a front side and/or back side of the spa. The longitudinal and lateral coupling members may support the hammock in the water to give the user a unique flotation experience.

A system and method for providing a hammock for a user to rest thereon in the water of the spa. The hammock may include a proximal end with head support portion and one or more attachment means for connection to an anchor on the spa shell, and a distal end with one or more attachment means for connection to an anchor on the spa shell. One or more lateral coupling members may couple the hammock to the lateral sides of the spa, and one or more longitudinal coupling members may couple the hammock to a front side and/or back side of the spa. The longitudinal and lateral coupling members may support the hammock in the water to give the user a unique flotation experience.

A wave park for an open or large body of water is disclosed. The wave park includes a body of water, and a track positioned in or proximate the body of water. The wave park further includes at least one foil coupled to move along the track, the at least one foil being at least partially submerged in the body of water. The at least one foil has a curvilinear cross-sectional geometry that includes a leading surface that is concave about a vertical axis to provide drag to generate a primary wave laterally in water of the body of water that contacts the leading surface of the foil, and a trailing surface that narrows from a maximum width of the foil adjacent the leading surface to a point at an end of the foil, the trailing surface to decrease the drag of the foil and to minimize oscillatory waves that trail the primary wave from the water moving past the leading surface of the foil.

An above ground frame pool (10) includes a frame assembly (20) and a liner (40) supported by the frame assembly (20). The frame assembly (20) includes a plurality of horizontal pipes (22), a plurality of vertical pipes (24), and a plurality of T-shaped joints (30). The joints (30) may lack mechanical fasteners with adjacent pipes or corresponding apertures. The joints (30) may be one-piece or multi-piece structures. Such joints (30) may be water-resistant and convenient to manufacture, assemble, disassemble, and store.

A method for treating water in a spa or a hot tub includes, for example, suspending a water treatment dispenser from an upper end of a filter cartridge disposed in a skimmer of the spa or the hot tub. The dispenser includes a water treatment material. A supply of water is passed from the spa or the hot tub into the skimmer and through the filter cartridge so that the dispenser suspended in the filtered water in the filter cartridge is operable to dispense the water treatment material from the dispenser, and a supply of treated filtered water from the filter cartridge is returned to the spa or the hot tub. A cover, for example, may be employed when the dispenser is not used.

A wave making apparatus for creating a surfing wave in a body of water. The waves are generated using a round bottom and front mechanical plunger. The plurality of round front plungers are assembled side by side in a vertical manner on a 90 degree back wall. The individual round front plungers actuate up and down, all at the same time, at different times, in sequence and can be placed in different shaped configurations to produce a swell into a body of water which then break of artificial surfing reefs to create a wave for surfing.

A wave-forming system includes a channel having a water inlet and a water outlet for directing water from the water inlet and the water outlet. The channel has a side wall and a bottom surface profile that slopes downward toward the water outlet and the side wall. The system also includes a back pressure barrier positioned in the water outlet to introduce a back pressure to the water flow inside the channel to continuously form waves across the channel.