advanced drainage system - Polypipe

General Site Instructions 3.5
Jointing Instructions
This advice applies to all Polypipe structured walled thermoplastic pipes,
seals and fittings. Note that sealing rings and lubricant may not be required
for unsealed systems.
Components from other manufacturers’ systems should not be used without
the written permission of Polypipe Civils Limited. Polypipe Civils Limited does
not guarantee any part of systems in which unauthorised components have
been used.
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Pipe preparation
The thermoplastic pipes are easily cut to length on site, preferably using a
coarse toothed saw or a heavy-duty jigsaw. Cuts should be made midway
between corrugations and be square to the pipe. Before jointing, ensure
that the ends of the pipe are free of sharp edges, swarf and dirt or grit.
Sealing ring
The correct sealing ring should be lubricated using Polypipe lubricant and
fitted between the first and second pipe corrugations. Ensure that the fitted
seal is fully seated in the corrugation and is not twisted. Any exceptions on
special products will be identified on the product labelling. All Polypipe seals
are of the compression type and are not directional.
Lubricant
Clean the inside of the coupling, if necessary, and apply sufficient Polypipe
lubricant to the sealing ring and inside bores of the coupling, making sure
they are kept clean until the joint is made.
Lubricant must be used on all sealed joints.
Fitting the coupling
Push the coupling over the seal and onto the pipe until the central register
of the coupler butts up to the pipe end. It may be easier to start the pipe
into the coupling if pushed at a slight angle initially. Pipes can be supplied
either integrally socketed or plain ended. Adaptors are available for the
connection to other pipe systems.
Making the connection
Push the pipe fully onto the coupling on the adjacent length by hand or,
if required, by levering it into place with timber sections. It is likely that
750mm and larger sizes will require mechanical assistance. Robust timber
should be used to protect the pipe and spread the load under these
conditions.
It may be easier to start the pipe into the coupling if the pipe is inserted at a
slight angle to the coupling initially. Ensure that the alignment of the pipes
is satisfactory and that the angular deflection is not excessive.
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