A publicly accessible urban beach entertainment complex is disclosed, with a man-made tropical, pristine-clear lagoon as the centerpiece of the complex, with surrounding entertainment, educational, sports, and commercial facilities, the complex having controlled public access and providing the look and feel of a tropical beach with clear waters and sandy beaches. In addition a method for efficiently utilizing facilities and land that are vacant, underutilized, have limited uses, or that are contiguous to or nearby recreational, educational, sports, or commercial venues is disclosed. The method providing a publicly accessible urban beach entertainment complex with a centerpiece man-made tropical-style pristine-clear lagoon. The method allows for generating revenue and increasing efficiency by pairing vacant sites, underutilized sites, limited use land, or sites that are contiguous to entertainment, educational, sports, and/or commercial venues with urban beach entertainment complexes. The complex preferably has a controlled public access, thereby allowing entrance upon payment of a fee.

Provided herein are portable hot tubs comprising a hot tub, a frame, and a pivotable wheel assembly comprising a suspension system for adopting three positions, a transport position, a drain position, and a use position.

A swimming pool filter element capable of automatically dosing. The swimming pool filter element includes a folding filter element and a doser filter element. The folding filter element includes a filter membrane and end covers, the end covers each having an upper end cover and a lower end cover. A wrench cover is arranged at the upper end of the upper end cover. The doser filter element includes a doser end cover, a doser lining and a doser shell. The doser filter element is added into the folding filter element, so that a water flow needing to be filtered firstly passes through the filter membrane of the folding filter element, solid large-particle impurities are filtered out, then the water flow enters the doser filter element and makes contact with sterilization tablets placed in the doser filter element, the tablets are dissolved, and finally water with dissolved tablets is discharged into a swimming pool.

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 water distribution device for simplified and partially automated maintenance of an artificial basin having a water inlet connected to a pump circulating water from the basin through a parallel configuration of pipes, connectors, servo-valves, a filter, a pump and a control unit. The control unit actuates the servo-valves to selectively pumping the water from the basin in a first flow direction through the filter in a filtering mode, from basin in a second flow direction through the filter in a filter washing mode, and from the basin through the piping without passing through the filter in a recirculation mode.

An automatic swimming pool cleaning robot capable of lateral translation relates to a technical field of cleaning robots for swimming pools. A controller compartment is disposed in a housing of the automatic swimming pool cleaning robot, the controller compartment is a sealed compartment, and a control circuit is disposed in the controller compartment. A driving motor is disposed in the housing, crawler belts are disposed on both sides of the housing, a cleaning rolling brush is disposed at a bottom of the housing, and the driving motor drives the cleaning rolling brush and the crawler belts through the transmission mechanism. A water inlet is defined at the bottom of the housing, a filtering device is disposed on the water inlet, and the housing covers above the filtering device. Two water outlets are defined at a top of the housing.

An original drain is removed from a pool gutter by cutting the joint where the drain tube joins the drain pipe. The remainder of the drain pipe is contained in a portion of the original drain tube. The replacement drain tube is inserted and bonded into the interior of the remaining drain pipe. A liquid flow path and reinforced joint are defined by the hopper of the replacement drain, original and replacement drain tubes, and the drain pipe. The top of the hopper of the replacement drain is tilted to about the slope of the gutter.

One or more embodiments of a device for providing a structure for a person to enter and exit a pool and support plumbing for the pool are disclosed. The structure includes a step structure, suction plumbing, and return plumbing. The step structure includes steps and a support structure configured to support the steps. The suction plumbing is fixed to the step structure and includes a first high point. The suction plumbing also includes a suction outlet below the first highpoint. The suction plumbing is arranged to pull water via the suction outlet and the first high point. The return plumbing is separate from the suction plumbing and is fixed to the step structure. The return plumbing includes a second high point and a return outlet. The return plumbing is arranged to output water via the second high point and the return outlet.

Provided herein are portable hot tubs comprising a hot tub, a frame, and a pivotable wheel assembly comprising a suspension system for adopting three positions, a transport position, a drain position, and a use position.

Automatic swimming pool cleaners and components thereof are described. The cleaners may provide dual filtration of debris suspended in water of pools as well as a fluid path allowing some water to by-pass one of the two filters. They also may include any of all components such as multi-section inlet tubes, Venturi jets, nozzles exhausting water onto rotatable vanes, brushes, downforce turbines, and mechanisms for adjusting water flow through thrust jets or sweep tails.