24
Geberit Drainage Systems
Jointing methods
Assembly instructions are the same for both ring-seal
sockets and screw-threaded joints – the sleeve lengths
are the same for corresponding diameters. The effective
sleeve length, i.e. the measurement – X – from the O-ring
to the base of the socket, governs the maximum length
of the pipe that can be connected by individual joints.
Insertion depth should be marked on the pipe with a
grease pencil prior to installation.
All pipes must be chamfered prior to insertion and seal(s)
lubricated. For HDPE, approximately 15mm of spigot
should be allowed for every 1m of pipe.
The pipe must be fully inserted into the socket, because
the socket does not act as an expander. Owing to the pipe
thickness and the low thermal conductivity of HDPE, the
socket seal has a very satisfactory resistance to heat and
no shrinkage of the O-ring occurs. The O-ring has a round
seat regardless of pipe movement. The O-ring remains
fixed in the seat and is always in contact with the pipe.
Length ‘x’ varies with the diameter.
Ideal fitting is obtained by chamfering the pipe end to
approximately 15°, lubricating it with soluble lubricant,
silicone or Vaseline.
Do not use mineral oil or grease
as it can damage the rubber seal.
x
4.4
Expansion fittings for
Geberit HDPE
Available in Ø 40 to 315mm.
Connection properties
a
Non-rigid, demountable joint.
b
Non-tension-resistant.
c
Simple push-fit connection.
Application
An expansion socket is recommended between
anchor brackets, particularly on installations assembled
with rigid joints and where excessive thermal movement
is anticipated.
At least one expansion joint must be provided on vertical
stacks running from floor to floor, long horizontal pipe
runs and before connecting to the buried drain pipework,
(please see section 7.3).
Different conditions apply for underground installations.
Please see section 7 for more information.
