manifold means 10 includes a plurality of supply heads 32 34 36 38 40 and 42 disposed in fluid communicating relation with branches 28 and 30 so that the intake manifold 10 may be interconnected with its associated heater panel means 12 14 16 18 20 and 22 each of the supply heads includes an attachment tip 44 46 48 50 52 and 54 respectively of relatively lesser outside diameter than its corresponding supply head as previously stated the construction of exhaust manifold means 24 is substantially identical to that just given with specific regard to intake manifold means 10 inasmuch as one of the primary objectives of the present invention is the elimination of the need for valving means to control the flow of water through the improved solar heater certain relationships between various elements of intake manifold means 10 should be noted in the preferred construction the inside diameter of main intake conduit 26 is 1 5 inches the inside diameters of supply branches 28 and 30 are identical both being 2 inches supply heads 32 34 36 38 40 and 42 are also of identical size each having an inside diameter of 0 75 inches finally each of the tips 44 46 48 50 52 and 54 are of the same size that being an inside diameter of 0 5 inches it is by virtue of this construction that intake manifold means 10.