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4. Installation guidelines
4.4
Cable duct guidance
The cable duct for the Delta Dual 800 Groundwater packaged pumping station should be 50 mm diameter. This can be
constructed of low pressure ABS waste pipe or high pressure PVC. A 50 mm rubber wall seal is supplied to connect the cable
duct to the chamber. The cable duct can be positioned on any flat face of the chamber neck. Please refer to Section 1.6.
4.4.1 CONSTRUCTING THE CABLE DUCT
To allow cables to be easily pulled through the cable duct use sweeping corners instead of tight 90 degree elbows. These can
be created by using two 45 degree elbows.
It is vital to pull a draw cord through the cable duct as it is being constructed.
4.4.2 CABLE EXTENSIONS
If cable extensions are required for the pump power cables or the float cable, a qualified electrical contractor must make all
electrical connections. Suitable cable extension kits are available to order. Please contact Delta Membranes on 01992 523 523
between 8am and 5pm, Monday to Friday or by email at info@deltamembranes.com for more information.
4.5
Vent duct guidance
If the pumping station receives surface water, for example from a lightwell, a vent duct must be installed. This duct must be
vented to atmosphere. An air‑admittance (Durgo) valve must not be installed. The vent duct's primary purpose is to equalise
pressure within the chamber. It will also mitigate any odours from stagnant surface water in the base of the chamber.
The vent duct should be 110 mm waste pipe. A 110 mm rubber wall seal is supplied to connect the vent duct to the chamber.
The vent duct can be positioned on any suitable flat face of the chamber neck. Please refer to Section 1.6.
A vent duct is not required if the chamber only accepts groundwater from a cavity membrane system.
9
Delta Dual 800 Groundwater Packaged Pumping Station
Pull a draw cord through
the cable duct as it is being
constructed, ensuring the
cord's loose end cannot
slip back into the duct.
Swept bends allow the cables to
be pulled through the cable duct.
DMS_IG_V800G 0123
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