Designing and installing a sewer system should come with considerations on how to help the system function at its best. The depth of a sewer line can impact its functionality, impact the slope, and complicate access for maintenance. Here are some factors that can change how deep a sewer system should be installed and common depths for residential and commercial systems.
Factors That Influence System Depth
The location of the sewer system and the surrounding climate can impact the appropriate depth. Putting the sewer system at the right depth will vary depending on the following factors.
Local Climate
Climates, where freezing temperatures are common, should consider burying sewer lines deeper than other locations. Installing them below the frost line will lower the risk of freezing which can cause cracking or leaks. The frost line will vary from state to state, which could mean that sewer lines are buried anywhere from a few inches to multiple feet.
Soil Composition
The type of soil can also impact where your sewer system lives. Loose soil can erode more easily, which means that sewer lines should be buried deeper to avoid exposure. Stable or clay-like soils allow for shallower depths that allow for easier access for maintenance.
Gravity Flow
Sewer systems need to be placed so that gravity can help move the waste efficiently. The depth of a sewer line can change if the slope of the line needs to be increased. Usually, around 1/4 inch per foot for pipes that are 4 inches in diameter is enough to keep a sewer productive. The deeper the starting point of the line, the more flexibility for sloping.
Building Code Requirements
Your local state or building codes could dictate how deep your sewer line needs to be. Consult with local authorities or your contractor to determine where the sewer system needs to be placed. Putting the system at the right depth at the beginning will save you headaches down the road. Compliance with these regulations will keep your system functional and help reduce large fines from the city.
Typical Sewer Depths For Residential Sewers
For most residential properties, sewer lines need to be installed at least 18 inches below the soil line. Residential lines can be placed up to 6 feet deep depending on factors like climate and slope. Existing structures or other buried lines will also need to be taken into account when installing residential sewer systems.
Typical Depths For Commercial Systems
Commercial installations will always be deeper than residential lines, often ranging from 4 to 12 feet. Some commercial lines are placed even deeper due to the amount of people utilizing the sewer system each day. More robust piping may be needed to handle the needs of a business, so deeper lines may be necessary to avoid other plumbing, and foundations, or to keep the sewer pipe from surface damage.
Why Depth Of A Sewer System Matters
Plumbing is complex and needs to be installed in just the right way in order for it to function at its best. Sewer lines are no exception, especially when you want to avoid expensive repairs.
The biggest reason to have sewer lines at the right depth is to avoid freezing. Frozen pipes and sewer systems will expand and contract, leading to leaks, bursts, and weakening of the material. All of these issues complicate your plumbing system and need to be repaired quickly to avoid further damage to your home, yard, or business.
Avoiding damage to the sewer lines is another reason to know the appropriate depth. The correct depth will give some added protection to the sewer system. The appropriate amount of soil will keep construction, landscaping, or vehicle traffic from damaging the sewer.
Sewer Line Services From Drain X
Our expert plumbers at Drain X are happy to help with residential and commercial sewer projects. Sewer lines can be tricky to repair and maintain, which is why calling in an expert is recommended. We address challenges head-on and provide you with a solution, not just a temporary fix.
The plumbers with Drain X have been working in this industry for over 20 years, which means we have learned how to serve clients of all varieties. With a commitment to excellence, modern tools, and timely response, you know you are getting the very best from Drain X. Contact us to locate sewer lines or schedule repairs in Weber, Box Elder, Davis, Morgan, or Salt Lake County.
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