Abstract: A system and method for circulating water in a swim spa. A recessed chamber formed in the shell of the spa defines a space to hold at least a portion of a first, upper horizontal water propulsion device and at least a portion of a second, lower vertical water propulsion device. The first, upper horizontal flow of water is combined with the second, lower vertical flow of water to create a third, horizontal flow of water. The resulting turbulence is lower, creating a more laminar flow and better user swimming experience. Jet bodies with side intakes may maximize capacity of the water propulsion devices.

Abstract: A reinforcing system for a vessel that can contain water. The system includes a shell for containing water, the shell having one or more jets extending therethrough from an inside of the shell to an outside of the shell, and a structural support layer on an underside of the shell. The structural support layer can include: an inner layer of rigidizer applied to the underside of the shell, a central low density core, and an outer layer of rigidizer applied to the central low-density core. The structural support layer can extend from a bottom side of the underside of the shell, across at least one sidewall of the underside of the shell, and form at least one rib along the sidewall of the underside of the shell.

Abstract: A system and method for circulating water in a swim spa. A recessed chamber formed in the shell of the spa defines a space to hold at least a portion of a first, upper horizontal water propulsion device and at least a portion of a second, lower vertical water propulsion device. The first, upper horizontal flow of water is combined with the second, lower vertical flow of water to create a third, horizontal flow of water. The resulting turbulence is lower, creating a more laminar flow and better user swimming experience. Jet bodies with side intakes may maximize capacity of the water propulsion devices.

Abstract: A reinforcing system for a vessel that can contain water is described. The system includes a shell for containing water, the shell having one or more jets extending therethrough from an inside of the shell to an outside of the shell, and a structural support layer on an underside of the shell. The structural support layer can include: an inner layer of rigidizer applied to the underside of the shell, a central low density core, and an outer layer of rigidizer applied to the central low-density core. The structural support layer can extend from a bottom side of the underside of the shell, across at least one sidewall of the underside of the shell, and form at least one rib along the sidewall of the underside of the shell.

Abstract: A system and method for reinforcing a spa shell includes a structural support layer on an underside of the spa shell. The structural support layer may include an inner layer of rigidizer, a central foam layer, and an outer layer of rigidizer. The structural support layer may extend from a bottom side of the underside of the spa shell, across at least one sidewall of the underside of the spa shell to a lip of the spa shell, the structural support layer forming at least one rib along the sidewall of the underside of the spa shell.

Abstract: A system and method for reinforcing a spa shell includes a structural support layer on an underside of the spa shell. The structural support layer may include an inner layer of rigidizer, a central foam layer, and an outer layer of rigidizer. The structural support layer may extend from a bottom side of the underside of the spa shell, across at least one sidewall of the underside of the spa shell to a lip of the spa shell, the structural support layer forming at least one rib along the sidewall of the underside of the spa shell.