The dimensioned sketch shows a simple hot-water apparatus, with cylinder, to meet only a moderate demand for hot water to supply bath, lavatory, and two sinks, such as exist in a moderately small house; a saddle boiler in a 9-in. fire (boiler about 11 1/2in. wide), with a, 20-gal. cylinder, should be large enough. The accompanying sketch shows the other particulars. If a stopcock is put in the cold-water service it must have a full-way through it. The small draw-off below the cylinder is an emptying service.

Simple Hot-water Apparatus.