47
Wavin AS+
Technical Manual
LKS-Schellensicherung
gegen Auseinandergleiten
Wavin Q-Bic
Pressure surges may occur in any part of systems located
upstream of pumps and pump stations. All fittings should the-
refore be secured using LKS clamps. Ensure that the fixings
used are able to withstand such pressure surges. The system
must be able to transfer dynamic loads to the supporting
structure.
In the case of rainwater drainage systems, fittings located at
changes of direction are critical. These fittings must therefore
be equipped with LKS clamps. Vertical pipes (downpipes)
do not require separate LKS clamps. Provided that the fixing
specifications provided by us in this manual are observed, the
joints on these sections will be suitably secured by the LKS
clamp fitted where the change of direction occurs.
Wavin LKS clamps are available for use with Wavin AS+ and
sound-insulating pipe systems in sizes DN 50 to DN
150.
For details of the required collar sizes and corresponding
article numbers, please refer to page 77 of our AS+ range.
Soundproofing
If interior spaces are subject to the technical provisions of
DIN 4109 (sound insulation in buildings), with pipe-born
noise not exceeding 30 dB(A), all work must conform to the
technical building regulations applying to in-building systems
with respect to the configuration of pipes in the context of the
corresponding floor plan. Waste water pipes that run through
living areas must not be exposed. If they are to run adjacent to
such living areas, they may only be installed inside walls with
a minimum specific area weight of 220 kg/m
2
(see supple-
mentary sheet no. 2 of DIN 4109, version of November 1989).
The same conditions apply when installing in brickwork reces-
ses conforming to DIN 1053, with pipes running along the
other side of an adjacent wall subject to protection measures,
where minimum wall dimensions of 220 kg/m
2
apply in the
area of the recess. Shafts or recesses in brickwork must then
be fitted with a supporting structure (matting or metallic mesh)
that allows them to be plastered over to a minimum depth 1.5
cm. There must be no sound bridges between the pipe and
plaster covering. Preventive measures in this respect include
pipe lagging of material classes A1, A2, B1, B2 (e.g. glass
fibre, mineral wool or plastic); see also Fig. 40.
As the routing of the pipe has a considerable influence on
both the generation and reduction of noise, measures should
be taken to minimise its impact. Falling waste water should
therefore be directed downwards in stages where possible,
i.e. not abruptly, as this would be technically unfavourable. In
the case of buildings with more than three storeys (> 10 m), a
noise-damping length of 250 mm is fitted between the down-
pipe and the horizontal pipe. This can take the form of two
45° bends and a corresponding length of pipe (see Fig. 42).
Fig. 32.
Fig. 33.
LKS to secure connection
