advanced drainage system - Polypipe

FAQ Section 3.8
b) Spigot and socket junctions
• Measure the effective length of the
junction (ie from inside face of
collar to end of spigot).
• At the proposed location of the
junction insertion, cut out the
appropriate length of existing pipe.
• Remove sufficient backfill material
and bed and surround material
at one end of the existing pipe to
enable the insertion of a flexible
rubber coupling (or slip coupling).
• Remove sufficient backfill, bed and
surround material at the other
end of the existing pipe to enable
the junction socket to be
pushed home.
• On the end of the existing
Ridgisewer pipe to receive the
junction socket, fit a sealing ring
between the first and second
corrugation.
• Insert socket of junction over end of
existing Ridgisewer pipe to
which sealing ring has been fitted.
• Centre flexible rubber coupling
over spigot end of junction and
tighten coupling.
• Form new bed and surround.
• Reinstate backfill to trench.
c) Plain ended junctions
• Measure the effective length of the
junction (ie from inside face).
• At the proposed location of the
junction insertion cut out the
appropriate length of existing pipe.
• Remove sufficient backfill, bed and
surround material at both ends of
the existing pipe to enable the
insertion of flexible rubber
couplings (or slip coupling).
• Insert junction.
• Centre flexible rubber coupling
over spigot end of junction and
tighten coupling.
d) Ridgitite Saddle
Typically the diameters of such lateral
connections would be either 110 &
160mm Ø. BS EN 1401-1 pipes or
150mm internal diameter clayware or
thermoplastic structured wall pipes.
Therefore Polypipe Civils has developed
the Ridgitite saddle to facilitate
connection of these particular
pipe diameters to existing pipelines.
Available for nominal pipe diameters
300 to 600mm.
It should be noted, when connecting
larger diameter pipes it is generally
normal practice to construct a manhole.
• Form new bed and surround.
• Reinstate backfill to trench.
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