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Sewer Gases and the Need to Install HDPE Liners to Manholes

Once new sewage systems are operational they produce a complex mixture of toxic and nontoxic gases that are collected in sewage systems by the decomposition of sewerage.  The larger and deeper these systems are, the more gases are created and the more the crucial it becomes to protect the new sewer assets.

These gases may include hydrogen sulphide, ammonia, methane, esters, carbon monoxide, sulphur dioxide and nitrogen oxides.  The main concern to the new (and existing for that matter) concrete sewage manholes is the hydrogen sulphide, which with the assistance of living bacteria and under the correct conditions, produces sulphuric acid which actively corrodes ferrous metals and concrete.

With the introduction of a basically inert High Density Polyethylene (HDPE) liner to the inside surfaces of a new manhole, the hydrogen sulphide cannot be converted into the aggressive acid and corrosion cannot occur.  The system will be then capable of fulfilling its design life and the council or asset managers are saved from costly repair or rehabilitation.

TestX is an approved provider of the required HDPE liner in full rolls, cut sheets or completely custom shapes.  We also provide in factory or onsite extrusion welding of all seams with fully compliant materials, equipment and technicians.

To find out how we can help – jump on to the link www.testx.com.au/services

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