Abstract: A valve includes a housing with an input for unheated water and an output for delivering unheated water to a toilet tank and a supplemental input for cooled and hot water in. The valve has a thermally responsive component to open and close the supplemental input.

Abstract: An improved Solar Pond Apparatus is described which comprises a solar pond means having a substantially flat, extended surface with upwardly directed sides thereof to retain the liquid while the liquid is exposed to the sun absorbing solar radiation and a flooding valve means connected to the solar pond means and moveable between an open position and a closed position to provide the liquid from the source and flood the liquid upon the substantially flat, extended surface of the solar pond means.