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.

Filter assemblies are described which may be rolled for use and unrolled for cleaning. Rolling an assembly may form a spiral path for fluid to flow. Fluid also may flow through mesh panels of the assembly unless such panels are obstructed, as by debris.

A non-inflatable above-ground pool is provided, including: a pool bottom and a pool wall connected to an edge of the pool bottom, together defining a water storage cavity. The pool wall comprises an inner wall, an outer wall, and a top sheet. Each of the inner wall and the outer wall have an upper edge connected to the top sheet and a lower edge connected to the pool bottom so as to define a filling chamber. A support wall body is disposed in the filling chamber and includes a wall body opening therethrough. A control box is arranged in the wall body opening and is in fluid communication with the water storage cavity via the inner wall.

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.

In one embodiment, a pool filter backwash assembly is described that comprises a pool filter extension configured to be connected to a backwash outlet of a pool filter and a backwash shower head configured to convert a backwash stream from the backwash outlet to a spray directed away from the pool filter. In some embodiments, the pool filter backwash assembly further comprises a backwash shower extension and an angled adapter. In addition, a method of backwashing a pool filter is described in which a pool filter backwash assembly is attached to a backwash outlet of a pool filter.

In one embodiment, a pool filter backwash assembly is described that comprises a pool filter extension configured to be connected to a backwash outlet of a pool filter and a backwash shower head configured to convert a backwash stream from the backwash outlet to a spray directed away from the pool filter. In some embodiments, the pool filter backwash assembly further comprises a backwash shower extension and an angled adapter. In addition, a method of backwashing a pool filter is described in which a pool filter backwash assembly is attached to a backwash outlet of a pool filter.

A gutter drain includes a hopper with a convex bottom adjustably mated to a socket in the top of a drain tube. The socket is sized and shaped as a negative impression of the convex bottom, except that the depth of the socket is less than the depth of the convex bottom. A downtube from the drain tube is sized to fit into and mate with a vertical drain pipe. The hopper may be positioned and angled flush with a pitched surface of a gutter.

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.

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.

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.