Abstract: A hydrotherapy tub including a water and air piping system which is easily cleanable in a thorough manner. A manifold is mounted on the outer surface of each side wall of the tub with each manifold having a water conduit and an air conduit which are fluidly connected to sources of pressurized water and air respectively. The water conduit and air conduit in each manifold is fluidly connected to horizontally spaced-apart discharge ports formed in the associate side wall of the tub.

Abstract: A hydrotherapy tub which utilizes a water and air piping system which is easily cleanable in a thorough manner. A manifold is mounted on the outer surface of each side wall of the tub with each manifold having a water conduit and an air conduit which are fluidly connected to sources of pressurized water and air respectively. The water conduit and air conduit in each manifold is fluidly connected to horizontally spaced-apart discharge ports formed in the associate side wall of the tub.

Abstract: A method of manufacturing an integral one-piece solar collector panel 10 by a rotational moulding process is disclosed. The solar collector panel 10 has a plurality of fluid ways 15 extending between opposed ends 18, 19 and transverse headers 18, 19 opening into the open ends of the fluid ways 15. The panel 10 is moulded by a rotational moulding process using mould faces with a non planar topography, eg in the form of a plurality of lines projecting outwardly proud of the remainder of the mould plate. This enables areas of the moulded body 12 to be formed that are not hollow and form a solid wall in the moulded panel and other areas of the body to be formed that are hollow and form the fluid ways 15 and headers 18, 19. After the moulding of the panel 10 has taken place the two opposed mould faces are moved towards each other to cause the contacting layers of mould material to firmly adhere to each other.

Abstract: A method of manufacturing an integral one-piece solar collector panel by a rotational moulding process is disclosed. The solar collector panel has a plurality of fluid ways extending between opposed ends and transverse headers opening into the open ends of the fluid ways. The panel is moulded by a rotational moulding process using mould faces with a non planar topography, eg in the form of a plurality of lines projecting outwardly proud of the remainder of the mould plate. This enables areas of the moulded body to be formed that are not hollow and form a solid wall in the moulded panel and other areas of the body to be formed that are hollow and form the fluid ways and headers. After the moulding of the panel has taken place the two opposed mould faces are moved towards each other to cause the contacting layers of mould material to firmly adhere to each other. This post moulding treatment step is not used in standard rotational moulding processes.