Mechanical Contracting & Plumbing January-December 1912 . branches. The effluent pipe is closedby means of a gate valve operated bythe attendant. At the inlet to the con-tact bed the arrangement of the pipingis such that the sewage can be turnedfirst into one bed, then into the , with two fillings a day foreach bed, both beds are used simul-taneously. While the usual practice is to fill thecontact filter bed from the top and todistribute the sewage evenly by meansof perforated surface troughs. The bedis shown in the illustration as beingfilled from the bottom, the inlet pipebeing
Mechanical Contracting & Plumbing January-December 1912 . branches. The effluent pipe is closedby means of a gate valve operated bythe attendant. At the inlet to the con-tact bed the arrangement of the pipingis such that the sewage can be turnedfirst into one bed, then into the , with two fillings a day foreach bed, both beds are used simul-taneously. While the usual practice is to fill thecontact filter bed from the top and todistribute the sewage evenly by meansof perforated surface troughs. The bedis shown in the illustration as beingfilled from the bottom, the inlet pipebeing extended downward into the bedof the bottom drain. This is done witha view of preventing any sewage smellarising from the filling of the bed. Thecontact beds remain uncovered, butshould be suitably screened from pub-lic view by planting shrubbery aroundthem. The purified sewage is discharg-ed by means of an outlet drain, with6 inch gate valve, into the S£CT/ON Fig 3.—Contact Beds for Final Sewage Purification. Chastisement Needed. An Ontario firm have received the fol-lowing letter accompanied by a cheque:Your bill, you remark, is long remark, plumbers bills should neverbe paid. But, seeing you are a man be-fore a plumber, I enclose you cheque for$ in full. Kindly send answer would vou give? by hand labor. A safety overflow pipeis provided about 12 inches above thelevel corresponding to the normal ca-pacity of the tank. This may lead tosome surface ditch or onto land at asufficiently low level. It is merely pro-vided to guard against negligence of theman in charge of the plant. The attend-ant is instructed to empty the tanktwice each day. The same collectingtank can also be used if a bricking fil-ter or contact beds are used. In amajority of cases owing to the rockyformation of the country, land treat-ment is not feasible, and therefore thefinal purification must be accomplishedpreferably by contact fil
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplumbin, bookyear1912
