Clay Pipe Installation Handbook

Chapter 5, Pipe Laying

Pipe Handling

Care should be taken when handling and lowering the pipe into the trench to prevent damaging the joint material or disturbing trench conditions.

Each section of pipe should be laid to the specified line and grade working in the upstream direction with the bell or coupling end laid upstream. Grade is checked with a laser, gradeliner or grade rod. (Figures 1 and 2)

Pipe Joining

The manufacturer's recommendations for pipe assembly must be closely followed.

Factory applied flexible compression joints are used to achieve tight lines in today's sanitary sewer construction. With these joints, care must be taken to wipe the mating surfaces clean before joining. Lubricate both joint surfaces, line up the socket and spigot, and shove the pipe together with a steady pressure. For small diameter pipe, this assembly can be done by hand. (Figure 19)

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For larger sizes, a bar may be used where a firm trench bottom permits. When using a bar, care should be taken not to damage the lip of the socket or cou pling. A wood block may be used to cushion the bar pressure. (Figure 20)

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Care must be taken to ensure that the joint is completely assembled.

For large diameter pipe, a sling or other approved device can be used to lower the pipe and aid in assembly. (Figure 21)

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NCPI - Clay Pipe Installation Handbook

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