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GROUNDWORKS Pumping station selection


Pump specialist T-T Pumps look at what specifiers need to know when it comes to sewage pumping stations


electing a pumping system can be a complex and time-consuming task which can involve several hundred calculations to ensure optimum efficiency, reliability and compliance. The key to streamlining this process is to understand the functions of a pumping station, the design challenges involved and the installa- tion practices required.


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Some of the main areas which need to be borne in mind by specifiers undertaking such installations include the following: • compliance and technical specification; • ease of installation; • space; • maintenance requirements; • longevity and resilience.


Purpose


A sewage pumping station is usually used to move sewage and surplus water to a sewer or sewage treatment works. In a nutshell, when gravity cannot be relied upon, a pumping station is installed to shift the water from one place to another. These systems are designed to act as a collection point for waste water and are stored in a large chamber from which they pump the liquid into the main sewer.


The chamber is a key part of the system, which also consists of pumps, pipework, guide rails, auto coupling assemblies and float switches. A separate valve chamber may be required as well as a control panel to run and monitor the pumping station. There are two main options of pumping stations to choose from: adoptable or non-adoptable.


Non-adoptable pumping stations


These systems usually serve domestic applica- tions, office premises, commercial/ industrial properties, hotels or nursing homes. A non- adoptable pumping station, also known as private pumping station or package pumping station, is designed to be economical to install and does not require compliance with the water companies’ specifications. These pumping stations are quick and easy to install and require less space to


accommodate them within the sewage network. They typically contain a pre-formed chamber element that is assem- bled off-site along with its own internal pipe work and valve system, and is then delivered to site in short timescales. The package pumping station is taken from a range of standard designs available on very short lead times.


Due to private pumping stations not


being ‘adopted’ by the appropriate water company, the property owners are responsi- ble for the running and maintenance costs.


Adoptable pumping stations


Adopable pumping stations’ name is derived from the fact that they are ‘adopted’ by the relevant water authority, who then become responsible for them.


An adoptable pumping station is designed and installed to suit the required water


Specifiers are required to supply a range of data, including a series of measurements, materials and capacity


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ADF MARCH 2017


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