2013/09 - Kessel

4. Installation
4.2 Pipe connections
All pipes are to be laid with negative slope into the Pumpstation
Aqualift F Chamber – meaning that wastewater will
flow with gravity out of the pipes and into the pumpstation.
All pipe connections must be flexible connections and be installed
with sound dampening accessories. The DN 100/150
pipe connections for the inlets, ventilation and cable supply
can be made with standard DN 100 or DN 150 KG piping.
The ventilation pipe serves to compensate negative and positive
pressure build-ups which can occur inside the pumpstation
as it is filled with wastewater or as wastewater is pumped
out of the system. Since these systems are normally installed
close to the building which they serve, it is recommended
that the pumpstation´s ventilation pipe be run to the
roof of the building – this will prevent odour nuisances in the
future. If the opportunity exists, the pumpstation´s ventilation
pipe can be connected to the building´s existing ventilation
pipe.
Cable supply pipe
(DN 100 connection)
Ventilation pipe
(DN 100 connection)
The pumpstation is shipped with gaskets
for securing any connecting pipes
such as the ventilation pipe and the
cable access pipe. These gaskets
should be lubricated before KG inlet and
ventilation piping is attached.
Main inlet
(DN 150 connection)
Control unit
Pressure outlet (OD 63 or 90 mm)
according to DIN 1986 should be
installed over the backwater level!
According to DIN EN 12056 the DN 150 wastewater inlet
pipe must have a minimum 2 % slope into the pumpstation
and should be laid as straight as possible. Bends and fittings
should be used only when necessary. The connection to the
DN 150 inlet to the pumpstation can be made with a female
/ female fitting or a DN 100 inlet pipe with reduction.
All electrical cable going to or from the pumpstation should
be installed in one DN 100 conduit pipe. This cable supply
pipe may be used for no other purpose other than running
cables. Curves / Bends in the cable supply pipe should be
handled with 30 or 45 degree fittings (no 67 or 90 degree
bends should be used which could complicate running cables
at a later date).
After all electrical installations have been completed it is important
that the cable supply pipe is completely air and water
tight. This can be accomplished with special cable sealing inserts
or with special expansion foams which will prevent
odour transfer into the building as well as water / moisture
entering the basement in extreme situations.
The outlet pressure pipe (DN 50 /
80)(connected to a private or public
sewer system) should be connected to
the supplied outlet using PN 10 PEHD
DN 50 (OD 63mm) or DN 80 (OD 90mm)
piping. In the case that the DN 80 pressure
outlet is to be used, the DN 50 pressure
pipe reduction should be cut off onsite.
This connection can be done by
welding the PE pressure pipes together
or by using appropriate heavy duty pipe
connection couplings.
According to DIN EN 12056, it is important that this outlet
pipe be plumbed over the local backwater level and then
down into a ventilated wastewater pipe and into the private
or public sewer (this outlet piping must be protected against
freezing) – this can be accomplished by:
• Running the outlet pressure pipe back into the building and
then running the pipe up and above the backwater level and
then down into the main drainage pipe to the sewer, or
• Running the outlet pressure pipe outdoors above the backwater
level and then back into the main drainage pipe (this
option requires the pipe to be protected against freezing
temperatures by either burying it in a soil mound / wall or in
a heated exterior enclosure).
A direct solid connection from the pressure pipe outlet to the
building should not exist – this will prevent noise / vibrations
being transferred to the building. No other drainage or pressure
pipes can be connected to the pressure outlet pipe.
After the pressure pipe outlet connections have been completed,
it should be pressure tested to assure that the piping
is securely fastened and is 100% watertight.
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