Practical sanitation; a handbook for sanitary inspectors and others;with apxon Sanitary law, by Herbert Manley . Fig. 28. Fig. 28 illustrates a good method of making a stonewaredrain joint. Hemp-spun yarn, free from tar, is first steeped influid cement (cement grout), and then well rammed into thejoint, so as to fill it about half. The joint is then completedwith stiff cement. Various patent joints have been invented from time to time,and it is found expedient tomake use of them in certaincases, as for example whenpipes have to be laid in water-logged soil, and difficulty isthus experienced in
Practical sanitation; a handbook for sanitary inspectors and others;with apxon Sanitary law, by Herbert Manley . Fig. 28. Fig. 28 illustrates a good method of making a stonewaredrain joint. Hemp-spun yarn, free from tar, is first steeped influid cement (cement grout), and then well rammed into thejoint, so as to fill it about half. The joint is then completedwith stiff cement. Various patent joints have been invented from time to time,and it is found expedient tomake use of them in certaincases, as for example whenpipes have to be laid in water-logged soil, and difficulty isthus experienced in makinga water-tight joint in theordinary manner. One ofthese (Stanfords), which was. Fig. 29. among the first to be introduced, is made by Doulton &, Co.,Lambeth. A rim of smooth and durable material is cast on to 80 PRACTICAL SANITATION. the spigot end of the pipe, and to the interior of the socket, so asto insure a tight fit, and a space is left to allow of cement beingintroduced as an additional precaution. More recently this jointhas been further improved, the composition which is cast on thespigot of the pipe being made convex on the surface, as shown inthe sketch (Fig. 29). The advantage claimed for this arrange-ment, although it is a doubtful one, is, that if from any causeafter-subsidence should occur, a certain amount of displacementof the pipes may take place (on the same principle as a ball-and-socket joint) without the integrity of the joint being impaired. The process of laying these pipes is very simple. Havingcarefully wiped the spigot and socket, a small quantity ofspecially-prepared lubricant is applied inside the socket of theone pipe, and round
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectsanitat, bookyear1904
