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A Basic Guide To New Construction Sewer Line Installation

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For those in the process of building their home, sewer line installation is a major part of the process. This is usually a multi-part task that may not be completed all at once. As the homeowner, you may want to know what to expect. The following are some of the basic requirements of a sewer line installation.

Plumbing the Foundation

Pass through plumbing must be installed at the time the foundation or basement is poured. Your sewer line installer or plumber will work closely with the foundation contractor to place the pipes and sewer lines in the framework, then they will return after the foundation is poured to ensure that everything lines up as it should.

Slope and Elevation Calculations

Slope and elevation calculations are typically done both before and after the foundation plumbing. Sewer pipes must run downslope from the house to the main sewer drain or the septic tank. The elevation of the foundation must then be higher than the connection point. This is especially important for municipal sewers since you will have little choice in the elevation of the main connection. For private septic, there is more leeway since you can always place the tank deeper underground in order to ensure the proper slope.

Grading the Site

The initial grading of the site typically takes place once the foundation is in place but before the main sewer line is installed. The land around a house needs to slope gently away from the foundation in order to ensure water doesn't collect near the foundation and lead to leaks. The main concern with grading and your sewer line is that you do not want extensive grading to take place after the line is installed since the heavy equipment could damage the newly laid line.

Trench and Base Installation

Now that the landscape is ready, the line can be installed. Your installer will first dig a trench to the depth and slope determined earlier in the process. The soil in the trench must be fully compacted to minimize the chances of soil shift. The trench will also be lined with a bedding material, typically gravel, that will further minimize soil shift while also ensuring any leaks from the pipe are filtered before the effluent can enter the groundwater.

Final Pipe Placement

The pipe is placed immediately following trench preparation. The joints and connections at either end of the pipe will be inspected and tested several times, and then the trench will be filled in and the soil will be properly compacted. Any desired landscaping can be completed after this process is done.

Contact a sewer line installer to learn more about this process. 


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