Improvements in or relating to Systems of Hot Water Circulation

4072. Wheeler, A. E., and Ridley, C. J. H. Feb. 17. Heating buildings.-In a low - pressure hotwater heating-system the rising pipe from the boiler is carried to a point above the level of the water in the distributing-tank and bent over so as to open below the water-level in the tank and thereby cause a ' siphonic or suction action ' for accelerating the circulation. In the form shown in Fig. 3, the pipe b is divided into two branches bending over as described and terminating in enlarged perforated ends b . Fig. 5 shows a plan of the tank. It is divided into two compartments by a partition c , which does not quite extend to the bottom of the tank. One compartment contains the pipe b and the other the inlet ball-cock. A third compartment c' is separated from the rest of the tank by a partition extending to just above the water-level. If the water boils, it overflows this partition and, passing down a pipe c gives warning that the water is overheated.