Table of Contents
Advertisement
4.6
Installation procedure
Please read these instructions in full, prior to commencement of the installation. If you are unsure on any point then contact
Delta Membranes on 01992 523 523 between 8am and 5pm, Monday to Friday or by email at info@deltamembranes.com
before proceeding.
1. Select a suitable location for the pumping station. Where possible, installation of a pumping station in a roadway should be
avoided due to the need for periodic maintenance of the pumps contained therein. If the location is adjacent to a roadway,
the installation method should take into account the imposed loads likely to be transmitted to the chamber by traffic etc.
2. Construct a suitable waterproof reinforced concrete (RC) sump (please refer to Section 4.3 for details).
3. Lift the chamber into the RC sump (please refer to Section 5) and position it such that all connections are correctly aligned.
Mark all connections and remove the chamber from the RC sump.
4. Install the rubber seals into the chamber wall for the 50 mm cable duct, 110 mm vent duct, and the inlet(s). The size and
number of inlets is project dependent (one 110 mm rubber wall seal is supplied as standard for inlets).
All connections should be aligned square to the chamber enabling the seals to remain watertight .
ENSURE A DRAW CORD IS PULLED THROUGH THE CABLE DUCT AS THE CABLE DUCT IS BUILT.
PLEASE REFER TO SECTION 4.4.
5. Lay a WET mass concrete into the base of the RC sump to a thickness of 100 mm,
6. Lift the chamber into the excavation (please refer to Section 5) and carefully position it onto the WET mass concrete base
ensuring that no loose debris is inadvertently knocked onto the base under the chamber during this procedure.
Manipulate the chamber so that it sits on the base of the RC sump then position it so that the inlet(s), cable duct, vent and
discharge connections are correctly aligned.
7. Once the chamber is positioned, connect the 50 mm cable duct, 110 mm vent duct and inlet pipework to the chamber
(please use fittings supplied). The discharge pipework can then be connected. The discharge pipework should be able to
withstand high pressure (PVC Class E or MDPE),
8. The vent duct should be vented to atmosphere; no air admittance (Durgo) valve to be used.
10. Whilst the concrete base is still WET, backfill the space between the chamber and the RC sump to the top of the chamber
with WET mass concrete in a single pour. The concrete must be evenly poured around the chamber ensuring that no voids
are left within the concrete.
During the backfilling process the chamber should be ballasted by steadily filling it with water. The difference in level
between the concrete backfill and the water ballast should always be less than 300 mm.
TO PREVENT THE CHAMBER FROM FLOATING UP WHEN THE RC SUMP IS BACKFILLED, THE
CHAMBER MUST BE BALLASTED WITH WATER AT THE SAME RATE AS BACKFILLING. THE LEVEL
DIFFERENCE BETWEEN THE WATER AND BACKFILL MUST NOT EXCEED 300 mm AT ANY TIME.
Care must be taken to ensure that any pipes (or other connections) are not damaged. During the concrete pour, ensure that
the chamber is vertical (by using a spirit level across the chamber's opening). Additionally, ensure that the chamber remains
at the correct depth level.
01992 523 523 info@deltamembranes.com www.deltamembranes.com
4. Installation guidelines
10
Advertisement
Table of Contents
