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Pipe installation in concrete structures
In concrete structures, conduits may be clamped
to reinforcements using cable ties or similar. The
distance between the attachment points should
not exceed 1 m to prevent the risk of the pipes
moving up during casting. The cable ties must
not be tightened excessively in a manner that
would deform or damage the conduit. When us-
ing LK PE-X pipes for concealed Pipe-in-Pipe lay-
ing in concrete, it is extremely important to con-
sider expansion-absorbing devices.
If the pipes are not laid with sufficient enough
room to expand, radiators/mixers may come
loose from their brackets in the event of high
temperature differences between the time of in-
stallation and when the system becomes fully op-
erational. Pipe expansion may also occur at mani-
folds, leading to a risk of the pipes coming loose
from their couplings. Ensure that the PE-X pipes
are pulled up into the couplings to the manifolds
or radiators/mixers in order to provide space for
expansion in the conduit/sleeve pipe. No expan-
sion-absorbing devices are needed for concealed
laying of "naked" LK PE-X and LK PAL pipes in
concrete as the pipes are secured in position in
the concrete.
Example of expansion-absorbing bends for concealed lay-
ing of Pipe-in-Pipe.
If underfloor heating is installed in the concrete
slab, the tapwater pipes must be placed at least 100
mm beneath the top edge of the topmost layer of
insulation. Alternatively, Pipe-in-Pipe Extra (insu-
lated pipes) may be laid beneath the insulation.
Tap water pipes and hot water circulation pipes
which are installed in concrete constructions with-
out floor heating should be placed in the insulation
or alternatively as Pipe-in-Pipe Extra above the
insulation.
Assembly instructions | LK PE-X, PAL and PE-RT pipes
Lashing
against reinforcement
at a maximum distance of 1 m.
Clamping against reinforcement.
Laying of Pipe-in-Pipe in a concrete slab with underfloor
heating.
Pipe laying using LK PE-X
and LK PAL to kitchen faucet
Dish washer
connection
Acceptable solution when installing kitchen mixers with
copper connecting pipes with LK PE-X and PAL Universal
pipes Pipe-in-Pipe.
Concrete
Reinforcement
LK Clip Rail
LK Underfloor Heating Pipe
Insulation
Pipe-in-Pipe
Pipe-in-Pipe Extra
Copper pipes
LK PE-X and PAL Universal pipe
Expansion space
EN.29.C.41.191217
7 (10)
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