Understanding Plumbing Problems

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Why A Trenchless Repair Is A Good Option For Fixing Hard-To-Reach Sewer Pipes

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Repairs on sewer lines often require some degree of digging because most of the pipes are buried underground. To complicate matters, a section of pipe that needs repair might be located under pavement or under a building. Property owners in need of a sewer line repair may be able to reduce the scope of a project with a trenchless sewer repair.

With a trenchless repair, a special method is used to apply a new pipe lining to the inner wall of an existing sewer pipe. The durable lining is as effective as the original pipe, and there is no need to remove the old pipe. Because only one or two access points are needed to perform the repair, any disruption to your home or business is kept to a minimum.

Repair preparation

The technique used to apply a new inner wall to a pipe entails the use of an inflatable bladder to hold the new material in place until it cures. For a short section of pipe, only one access point may be needed. For a longer segment of sewer line, a second access point is likely necessary. Before a new inner wall can be added, high-pressure water blasts are used to clean the interior wall of the damaged pipe.

Formation of a new pipe lining

The new lining installed on the interior of a pipe is typically made of felt and fiberglass. The lining is saturated with epoxy resin before it is inserted into the pipe. Inside the length of lining is an equally long inflatable bladder. Both materials are pulled into the pipe before the bladder is inflated. After the epoxy-soaked lining has cured against the pipe wall, the bladder is deflated and pulled from the pipe.

A second access point may be needed to facilitate the pulling of the lining into a section of pipe. The epoxy resin is applied to the lining just before it is inserted into the pipe. Before insertion, some type of mechanical roller is used to ensure that the epoxy resin is evenly spread throughout the fibers of the new lining.

Flexible repair options

A trenchless sewer repair can be performed on pipes made of clay, PVC, or cast iron. The trenchless method can accommodate many of the common angles found in pipe systems.

The curing time for epoxy resin used in pipe repair is several hours, but the required time can be reduced by adding heat during the process. Contact a plumbing service for more information about trenchless sewer repair services.

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27 August 2018