Alert! is your pex pipe a drinking water hazard? get the facts here

The safety of PEX pipe for drinking water has been a subject of debate among homeowners and plumbers alike. PEX (Polyethylene Cross-linked) pipe is a flexible, plastic tubing increasingly used in plumbing systems. Its durability and ease of installation have made it a popular choice, but concerns have been raised about its potential impact on drinking water quality. This blog post aims to provide a comprehensive assessment of the safety of PEX pipe for drinking water, addressing common concerns and exploring the latest research findings.

What is PEX Pipe?

PEX pipe is a type of cross-linked polyethylene plastic pipe used for plumbing applications. It is manufactured by cross-linking the polymer chains in polyethylene, resulting in a stronger and more flexible material. PEX pipe is available in various sizes and colors, making it suitable for both hot and cold water distribution systems.

Safety Concerns Regarding PEX Pipe

The primary safety concern associated with PEX pipe is the potential for leaching chemicals into drinking water. These chemicals, such as benzene and formaldehyde, are used in the manufacturing process of PEX pipe and may pose health risks if ingested.

Research Findings on PEX Pipe Safety

Numerous studies have been conducted to evaluate the safety of PEX pipe for drinking water. The findings of these studies have generally been positive, indicating that PEX pipe does not leach significant levels of harmful chemicals into drinking water.

Study 1: National Sanitation Foundation (NSF)

The NSF is an independent organization that certifies products for public health and safety. In 2009, the NSF conducted a study on PEX pipe and found that it met the requirements for drinking water applications. The study concluded that PEX pipe did not leach harmful chemicals into water at levels that would pose a health risk.

Study 2: University of Wisconsin-Madison

A study published in the Journal of Environmental Engineering in 2011 examined the leaching of chemicals from PEX pipe. The study found that the levels of chemicals leached from PEX pipe were below the detection limits of the analytical methods used.

Factors Affecting PEX Pipe Safety

While the research findings generally support the safety of PEX pipe for drinking water, certain factors can affect its safety:

Type of PEX Pipe

There are different types of PEX pipe, including Type A, Type B, and Type C. Type A PEX pipe is the most commonly used for drinking water applications and has been shown to be the safest.

Installation Practices

Proper installation is crucial for ensuring the safety of PEX pipe. The pipe should be cut cleanly and connected using the appropriate fittings. Avoid using excessive force or bending the pipe too sharply, as this can damage the pipe and increase the risk of leaching.

Water Quality

The quality of the water flowing through PEX pipe can also impact its safety. Highly acidic or corrosive water can degrade the pipe and increase the risk of leaching.

Benefits of PEX Pipe for Drinking Water

In addition to its safety, PEX pipe offers several benefits for drinking water applications:

Corrosion Resistance

PEX pipe is highly resistant to corrosion, unlike metal pipes that can rust over time. Corrosion can contaminate drinking water and pose health risks.

Flexibility

PEX pipe is extremely flexible, making it easy to install in tight spaces or around obstacles. This flexibility reduces the need for fittings and connections, which can be potential leak points.

Durability

PEX pipe is durable and has a long lifespan. It is resistant to freezing and thawing, making it suitable for use in both hot and cold climates.

Alternatives to PEX Pipe

If you have concerns about the safety of PEX pipe, several alternative options are available for drinking water applications:

Copper Pipe

Copper pipe has been used for plumbing for centuries and is known for its durability and corrosion resistance. However, copper pipe can be more expensive than PEX pipe and requires specialized tools for installation.

PVC Pipe

PVC (Polyvinyl Chloride) pipe is another plastic pipe option for drinking water. It is less expensive than PEX pipe but is not as flexible and can be more brittle.

Stainless Steel Pipe

Stainless steel pipe is a durable and corrosion-resistant option but is more expensive than other options and requires specialized tools for installation.

Final Note: Navigating the Safety of PEX Pipe for Drinking Water

Based on the research findings and industry consensus, PEX pipe is generally considered safe for drinking water applications. However, it is essential to choose the appropriate type of PEX pipe (Type A), ensure proper installation, and consider the water quality in your area. If you have concerns about the safety of PEX pipe, alternative options such as copper, PVC, or stainless steel pipe are available. Ultimately, the best decision for your specific situation depends on your individual needs and preferences.

What You Need to Know

Q1: Is PEX pipe safe for drinking water?

A1: Yes, PEX pipe is generally considered safe for drinking water applications, as supported by research findings and industry certifications.

Q2: What chemicals are used in PEX pipe manufacturing?

A2: Chemicals such as benzene and formaldehyde are used in the manufacturing process of PEX pipe, but research has shown that these chemicals do not leach into drinking water at harmful levels.

Q3: How can I ensure the safety of PEX pipe in my home?

A3: Choose Type A PEX pipe, ensure proper installation, and consider the water quality in your area. If concerned, consult a licensed plumber for guidance.

Q4: What are the alternatives to PEX pipe for drinking water?

A4: Alternatives to PEX pipe include copper, PVC, and stainless steel pipe, each with its own advantages and disadvantages.

Q5: How long does PEX pipe last?

A5: PEX pipe has a long lifespan and can last for several decades when properly installed and maintained.