Repiping with PEX to Prevent Corrosion of Aggressive Water

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Aggressive water poses a significant problem for many homeowners, often leading to the premature corrosion of plumbing systems. This type of water contains high levels of minerals, gas content, or alkalinity, which can damage galvanized and copper piping over time. One of the main reasons for such damage is the presence of carbon dioxide or low pH levels, which accelerates the wear on copper pipes. Additionally, thermal-galvanic corrosion can occur due to various factors, primarily affecting hot water systems.

Two Main Types of Corrosion Caused by Aggressive Water

When dealing with aggressive water, there are two main types of corrosion that can occur: thermal-galvanic corrosion and pitting corrosion.

  1. Thermal-Galvanic Corrosion: This type of corrosion primarily impacts hot water pipes. It is triggered by the interaction between different metals in the plumbing system, causing the metal in the pipes to corrode over time. Hot water accelerates this reaction, leading to faster damage in hot water lines compared to cold water lines.
  2. Pitting Corrosion: This is a more severe form of corrosion that affects the entire plumbing system. Pitting corrosion occurs when aggressive water eats away at the pipes, creating small holes or “pits.” These pits weaken the pipe structure, leading to leaks and potential system failure. Statistics indicate that pitting corrosion accounts for more than 75% of all repiping jobs, while thermal-galvanic corrosion is responsible for the remaining 25%.

The Impact of Aggressive Water on Copper Piping

Research shows that the severity of aggressive water can cause new copper pipes to fail within just 1-10 years. In certain cases, entire housing developments have experienced widespread failure of their plumbing systems due to aggressive water. When pitting corrosion is detected, a complete repipe of the entire system is often necessary. For thermal-galvanic corrosion, repiping may be limited to the hot water supply lines.

Why PEX is the Ideal Solution for Aggressive Water

Plastic piping, such as PEX, offers an excellent solution for homes affected by aggressive water. Unlike copper or galvanized pipes, PEX is resistant to the corrosive effects of water with high mineral content or low pH levels. By using PEX, homeowners can avoid the need for future repiping and enjoy a more durable and long-lasting plumbing system.

In some states, building codes have traditionally required the use of copper pipes for residential water distribution. However, many states are beginning to allow the use of alternative materials such as PEX or CPVC, particularly in areas known for aggressive water. In some cases, homeowners may be able to repipe their homes with PEX instead of copper, provided they can demonstrate the presence of aggressive water in their system.

Benefits of PEX in Aggressive Water Environments

  1. Resistance to Corrosion: PEX is not susceptible to corrosion from aggressive water, making it a more reliable option for homes with water quality issues.
  2. Durability: PEX pipes are designed to last longer than copper pipes, even in harsh water conditions. This reduces the need for frequent repairs and repiping, saving homeowners time and money.
  3. Flexibility: PEX is a flexible material, which allows for easier installation and fewer connections. This can reduce the risk of leaks and improve the overall efficiency of the plumbing system.
  4. Cost-Effective: In areas where copper pipes are prone to corrosion, repiping with PEX can be a more cost-effective solution. It eliminates the need for expensive repairs and ensures a longer-lasting plumbing system.

The Future of PEX in Residential Plumbing

As more states begin to recognize the benefits of PEX and CPVC piping, it’s likely that these materials will become more widely used in new construction and repiping projects. Homeowners dealing with aggressive water can benefit greatly from these advancements, as PEX offers a reliable, durable, and cost-effective solution to the problems caused by corrosive water.

In conclusion, if you’re facing issues with aggressive water in your home, repiping with PEX is a smart choice. It provides long-term protection against corrosion and ensures that your plumbing system remains in good condition for years to come. Always consult with a qualified repipe specialist, such as Super Brothers, to determine the best course of action for your home’s specific needs.

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