Does Your Sewer Line Need Cleaned, Repaired, or Replaced?
Drains becoming blocked often indicates a deeper issue that requires attention to prevent further complications. Sewer systems are typically built to require, except for occasional issues such as grease accumulation in kitchen drain lines or hair blockages in traps. This article will explore common issues that can arise in the average North Texas household and provide guidance on the most effective solutions, including thorough sewer line cleaning, fixing damaged connections, and replacing entire sections of the system as needed. What is the history of drain pipe material? Drain pipes are typically made of either cast iron or PVC materials. Before the mid-1980s, cast iron piping was commonly used for water and sewer lines in residential buildings. However, with the introduction of PVC plastic piping in the mid-1980s, it quickly became the preferred choice due to its lighter weight, ease of installation, and corrosion resistance. As a result, cast iron piping saw a decline in usage for home plumbing systems. Before the 1960s, it was typical to use clay or terra cotta for the sewer connecting the house to the municipal sewage system. Orangeburg piping, a type of nonmetallic pipe made from bituminized fiber, was commonly used in residential construction during the post-WWII era due to supply chain disruptions caused by the war. It was installed in houses constructed from the mid-1940s through the 1960s. In the North Dallas region, including the Dallas area, a combination of cast iron and PVC piping systems are commonly used for water and sewer lines. Specifically, in cities such as Plano, Dallas, Frisco, and The Colony, which are located just north of Dallas, many homes built in the 1970s and early 1980s by large developers like Fox and Jacobs feature cast iron pipes under the slab foundation and in the yard. However, towards the end of this construction period, builders began to shift towards using PVC pipes above the slab, while still utilizing cast iron pipes below the foundation. In the northern suburbs, such as Frisco, McKinney, Prosper, and Allen, the majority of homes were constructed between 1990 and the current day, and typically feature PVC piping in their drainage systems. How were cast iron pipes installed? The installation of cast iron pipes in the past involved a time-consuming process of connecting pipe sections using a combination of lead and a rope-like material called oakum. To achieve a watertight seal, workers would pack the oakum into the gaps between the pipe joints and then fill the space with molten lead. As cast iron piping’s popularity began to wane, a new technique emerged that utilized circular rubber gaskets, often referred to as “donuts” or “compression gaskets,” to connect pipes. Additionally, PVC rubber couplings, secured with stainless steel clamps, became a common method for joining pipes together. What causes a broken cast iron drainpipe? A corroded cast iron pipe is typically the reason for a broken cast iron drainpipe. Cast iron pipes are rigid and heavy, but they have some flexibility at the connecting points where the pieces are joined. As a result, it is rare for cast iron drain piping to be crushed or damaged by external force or soil shifts. Extensive soil shifting can weaken the seal at the joints, resulting in water leakage whenever water passes through the drain. The moisture and nutrients in the soil near the leak eventually entice tree roots to grow into the pipe from that location. Eventually, the pipe will become blocked by this issue. Typically, the roots can be cleared using a sewer machine unless there is a major break, but they will likely return, creating an ongoing need for maintenance until the piping is replaced. How do “bellies” occur in cast iron sewer systems? In cast iron sewer systems, “bellies” can form when the pipe is not properly supported during installation or when the surrounding soil undergoes significant settlement, causing the pipe to sag or dip at the joints and creating uneven water flow. These low-lying areas typically don’t cause immediate blockages, but instead tend to accumulate debris gradually, leading to an increased likelihood of clogs over time. The severity and regularity of these clogs are influenced by factors such as the system’s age, usage patterns, and the extent of the sag. Do cast iron drain pipes corrode? The concern lies in the corrosion of cast iron drain pipes over time. Typically, horizontal will rust and deteriorate, eventually leading to failure. Older cast iron pipes appear to have been made more durable compared to those produced in the late 1970s and early 1980s before they were no longer used. The pipe’s age will inevitably corrode from both internal and external factors. However, the primary decay originates from within, where water’s natural corrosive properties are often intensified by the presence of harsh chemicals and detergents that flow through the pipe. Do cast iron drain pipes clog? Cast iron, particularly in older systems. The internal surfaces of these pipes can become rough and irregular, providing a foothold for debris and grease to accumulate, leading to frequent blockages. This process often begins long before the pipes have deteriorated to the point of leakage, making regular maintenance a necessity. The issue is further complicated by the installation of modern water-efficient fixtures in homes during renovations or updates. Specifically, “low-flow” toilets, which use only 1.28 gallons per flush, are often criticized for their inability to effectively transport waste through older, cast iron pipes to the municipal sewer system, despite their ability to clear the toilet bowl itself. In areas like North Dallas, and Plano, where neighborhoods are undergoing revitalization and homes are being renovated, we frequently encounter specific plumbing challenges. As a result, we often advise homeowners to rebuild existing toilets in older homes with cast iron plumbing systems rather than installing new, low-flow models. Can a rough, cast iron pipe be cleaned? If a rough cast iron pipe is not significant,









