. Principles and practice of plumbing . anchors for the support ofhand rails is shown in Fig. 167. A piece of pipe flattenedat one end to keep from turning and threaded and bent atthe right angle, is built into the wall. Then when theglazed brick or tile are in place the rail can be finished byputting the cast brass skew plates on the anchor pipes, thenscrewing into place the cast brass ring heads. Heating Water for Swimming Pools.—The water in Digitized by Microsoft® 362 Principles and Practice of Plumbing a swimming pool is generally heated by circulating itthrough a steam water heater. Some
. Principles and practice of plumbing . anchors for the support ofhand rails is shown in Fig. 167. A piece of pipe flattenedat one end to keep from turning and threaded and bent atthe right angle, is built into the wall. Then when theglazed brick or tile are in place the rail can be finished byputting the cast brass skew plates on the anchor pipes, thenscrewing into place the cast brass ring heads. Heating Water for Swimming Pools.—The water in Digitized by Microsoft® 362 Principles and Practice of Plumbing a swimming pool is generally heated by circulating itthrough a steam water heater. Sometimes when the pool isat a higher level than the boiler room, a simple gravity sys-tem of heating by means of a coal water heater such as isshown in Fig. 168 is employed. The cold water supply isconnected to the heater, and by-passed to the pool, so watercan be supplied direct or through the heater. In very smalltanks only one inlet and outlet connection will be necessary,but in large tanks multiple connections give a better distri-. bution and circulationof the usual method ofheating water for swimmingpools is shown in Fig. 169. Theheater, which in this case is anordinary feed-water heater, isconnected up so either live steamor exhaust steam can be pump is used for circulatingthe water, and the connectionsto the pump are cross connectedto the sewer, so the water fromthe pool can be discharged by the pump into the city of Swimming-Pool Water.—The waterin a swimming pool becomes contaminated very quicklywhen in use, each bather contributing some towards thisstate of affairs. Serious infections have been traced directlyto unsanitary pools. The Detroit Board of Health tookweekly samples of a pool for a period of one year. During Fig. 168 Heating Plungewith Water Heater Digitized by Microsoft® Principles and Practice of Plumbing 363 this time filtration and chemical disinfection were result showed a maximum count of 216,000 coloni
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