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SITE PREPARATION STRUCTURAL COMPONENTS


hour inflow to allow for disruption to service. The minimum daily discharge of foul drainage should be taken as 150 litres per head per day for domestic use. “For other types of building, the capacity of the receiving chamber should be based on the calculated daily demand of the water intake for the building. Where only a proportion of foul sewage is to be pumped, then the capacity should be based pro-rata. In all pumped systems the controls should be so arranged to optimise pump operation.”


SELECTING THE RIGHT PUMP STATION There are a few key criteria that need to be considered while selecting a pump station that meets your requirements:


• Distance the pump/s need to travel in metres


• Uphill lift in metres • Capacity of pump stations required • Requirement of 24-hour storage to comply with Building Regulations.


PART H BUILDING REGULATION – 24-HOUR STORAGE


Part H of Building Regulation offers guidance on drainage including foul and surface water and rainwater, and sanitary waste disposal, including sewage structures and their upkeep. Approved Document H1 2.39 states that, “Where foul water drainage from a building is to be pumped, the effluent receiving chamber should be sized to contain 24-


GRP VS POLYETHENE GRP tanks are manufactured by hand or in a semi-automated process. Anything made by hand is subject to human error and discrepancies. GRP tanks are effectively a skin and do not have any structural stability until encased in concrete. The concrete is what gives the chamber its strength.


Polyethene tanks on the other hand are made using a fully automated process. This results in a consistent product thickness throughout a chamber which is free of defects. This means a much stronger and durable finish, and a life over 20 years.


Dan Berry is area sales manager at Harlequin Manufacturing


34 www.sbhonline.co.uk


jul/aug 2021


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