Modern plumbing illustrated : a comprehensive and thoroughly practical work on the modern and most approved methods of plumbing construction ... . IId>022^ (^z^apy. C2eo2d,=T-^f^ THE HOUSE OR MAIN TRAP AND FRESH AIR INLET In the construction of any plumbing system, one of the firstthings to be decided is whether the system shall be protected by amain trap or not. The question is a debatable one, and has been since the intro-duction of the trap itself. Plate 15 shows three methods of installingthe main trap and its accompanying fresh-air inlet. From theseillustrations it will be seen that th
Modern plumbing illustrated : a comprehensive and thoroughly practical work on the modern and most approved methods of plumbing construction ... . IId>022^ (^z^apy. C2eo2d,=T-^f^ THE HOUSE OR MAIN TRAP AND FRESH AIR INLET In the construction of any plumbing system, one of the firstthings to be decided is whether the system shall be protected by amain trap or not. The question is a debatable one, and has been since the intro-duction of the trap itself. Plate 15 shows three methods of installingthe main trap and its accompanying fresh-air inlet. From theseillustrations it will be seen that the main trap is placed on the housedrain at a point as close to the place where the drain leaves thebuilding as possible. The object of this trap is to prevent the entrance into the plumb-ing system of gases and odors from the sewer. At first thought, the entrance of gases into the plumbing systemwould not appear to be harmful, especially as it has abundant oppor-tunity to rise and escape through the roof pipes. However, althoughthe plumbing system of to-day is subjected to rigid test after beingconstructed under rigid ordinances, there are numerous ways inwhich
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplumbing, bookyear190
