Plumbing practice / by J. Wright Clarke.

  • James Wright Clarke
Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: Plumbing practice / by J. Wright Clarke. Source: Wellcome Collection.

    90/390 (page 78)
    Lead joints have been made on lead service pipes. One trom Hampton Court Palace is shown at Figure 67. Instead of the ends of the pipe being soldered together, a quantity of molten lead was poured on, ^llllillB jk. and it presented the appearance as shown. From the rough appearance of the inside of the joint it could be seen that the Figure 67. pjpg ends were filled with sand, and then, doubtless, they were butted together and buried in more sand, leaving a space round the part to be joined, into which was poured molten lead until the pipe itself was fused, the surplus metal running away over a weir in the same manner as was described for burning seams on heavy pipe. It has been suggested that common salt would make a good core, as it would answer perfectly, and when water was allowed to pass through, the salt would dissolve. Sand would probably get baked hard and so require some time for the water to displace it. Salt would not be so injurious as sand to any fittings that it might have to pass through. When soil pipes or waste pipes are fixed in a chabe in the wall it is a very good plan to make what is commonly called a Uoch joint. This is a very easy joint to wipe, but it is sometimes improperly prepared. On looking at Figure 68, which shows a section of pipe and jomt, A A represents a wooden (or stoite) block, perforated for the pipe to pass through, and the ends long enough to lay on the brickwork each side. The carpenter or mason should be instructed to take off the sharp arris round the hole. A common way is for the plumber to taft over the pipe sufficiently to get enough to lay on the block for him to solder to. When the plumber opens the end of the pipe, if the block fits tightly, the end grain of the wood cuts into the lead and so weakens it just where it should be the strongest, as the pipe is partly suspended at this point. The plumber, in