Plastic Pipework Cost Efficiency: Pros and Cons

When it comes to plumbing, choosing the right pipework can save you money and headaches down the track. Plastic pipework has become a popular option for homeowners and business owners alike, and for good reason. At All Needs Plumbing, we’ve installed countless plastic plumbing systems and seen firsthand how they can offer cost efficiency without compromising quality. Let’s break down the pros and cons of plastic pipework cost efficiency so you can make the best decision for your property.

What Is Plastic Pipework?

Plastic pipework refers to pipes made from materials like PVC (Polyvinyl Chloride), CPVC (Chlorinated Polyvinyl Chloride), PE (Polyethylene), HDPE (High-Density Polyethylene), and PEX (Cross-linked Polyethylene). Lightweight, bendable, and easy to handle, these pipes are ideal for various plumbing tasks, including water supply and drainage systems. Plastic pipes have become the standard in both homes and businesses because they can be used in a lot of different ways.

For example, in commercial buildings, plastic pipes are often used for cold water lines, irrigation systems, and drainage because they resist corrosion and are easy to install in complex layouts. In my experience with All Needs Plumbing, plastic pipework has consistently proven to be reliable and cost-effective across numerous projects.

Pros of Plastic Pipework

Cost Efficiency

Plastic pipes generally cost less than traditional metal pipes, such as copper or steel. The material itself is cheaper, and because plastic is lighter and easier to work with, installation times are shorter, which lowers labour costs. This is a big win for commercial projects, where budgets and timelines are often tight. For instance, a recent commercial job we completed saved the client thousands simply by opting for plastic pipework over copper.

Corrosion Resistance

Rust and corrosion are two of the worst things that can happen to metal pipes. They can cause leaks, contaminated water, and even pipe failure. Plastic pipes don’t corrode or rust, so they maintain water quality and last longer without costly repairs. This makes plastic pipes especially suitable if your water supply is acidic or contains minerals that would otherwise damage metal pipes.

Lightweight and Easy to Install

Plastic pipes are much lighter than metal ones, which makes them easier for our team to carry, cut, and fit. This reduces the risk of injury on-site and speeds up the installation process, resulting in less disruption to your home or business. The lighter weight also means less strain on supporting structures, which is important in multi-storey buildings.

Flexibility

Plastic pipes can bend around corners and obstacles without needing extra fittings. This flexibility reduces the number of joints and connections required, which in turn lowers the chance of leaks. It also means installation is faster and neater, especially in tight or awkward spaces.

Noise Reduction

Have you ever heard pipes banging or clanging when you turn on the tap? Plastic pipes absorb sound better than metal pipes, so they help keep your plumbing system quieter. This is a subtle but welcome benefit, especially in office buildings or apartments where noise can be a significant issue.

Low Thermal Conductivity

Plastic pipes don’t transfer heat as quickly as metal pipes. This means hot water stays hotter for longer when travelling through plastic pipes, reducing energy use and saving you money on your heating bills. It also means the pipes stay cooler to the touch, reducing the risk of burns.

Cons of Plastic Pipework

Temperature and Pressure Limits

Plastic pipes aren’t suitable for very high temperatures or pressures. For example, if your system requires water hotter than about 60°C or very high-pressure flow, plastic pipes might not be the best choice. In such cases, metal pipes, such as copper or stainless steel, perform better. It’s important to match the pipe material to your system’s requirements.

UV Sensitivity

Some plastic pipes can degrade if exposed to direct sunlight for long periods. UV rays break down the plastic, causing it to become brittle and crack. If you have outdoor plumbing, you’ll need to either protect the pipes with insulation or use UV-resistant plastic pipes designed for outdoor use.

Environmental Impact

Plastic pipes are made from petroleum-based materials and are not biodegradable. Although they last a long time, they are more difficult to remove and recycle than metal pipes. This is something to consider if you’re aiming for an environmentally friendly plumbing system.

Potential Chemical Leaching

In certain situations, such as when pipes are exposed to high temperatures or harsh chemicals, some plastics can release chemicals into the surrounding water. Using certified pipes designed for potable water and ensuring proper installation can minimise this risk.

Physical Vulnerability

Plastic pipes can be more prone to cracking or punctures compared to metal pipes. They’re less resistant to sharp impacts or heavy loads. For example, if heavy equipment is moved over exposed plastic pipes, damage can occur. Proper installation and protection help prevent this.

Plastic Pipework vs. Metal Pipework

Plastic pipes excel in terms of cost, ease of installation, and corrosion resistance. Metal pipes, however, excel in handling high temperatures and pressures, and they are more resistant to physical damage. For commercial plumbing, the cost efficiency of plastic pipework often outweighs the benefits of metal, especially when labour savings and longevity are factored in.

Choosing between plastic and metal pipes depends on your specific needs. If you want a budget-friendly, corrosion-resistant system that’s quick to install, plastic is often the way to go. If your system requires high heat tolerance or extreme durability, metal might be a better choice.

Maintenance Tips for Plastic Pipework

Regularly inspect your plastic pipes for any signs of wear, discolouration, or leaks. Catching small issues early can prevent costly repairs later on. Look for soft spots, bulges, or damp patches around joints and fittings.

Also, avoid exposing outdoor plastic pipes to direct sunlight. Protect pipes from UV damage and freezing temperatures by insulating or covering them. Taking this one step can significantly extend the lifespan of your pipes and reduce the cost of repairs.

When installing or repairing plastic pipes, make sure all joints are properly sealed with the correct solvent cement or fittings. Leaks in plastic plumbing systems are often caused by poor sealing.

FAQs About Plastic Pipework Cost Efficiency

How to tell the difference between PE and HDPE?

PE (Polyethylene) and HDPE (High-Density Polyethylene) differ mainly in density and strength. HDPE is tougher and more rigid, often used for water mains and industrial plumbing, while PE is more flexible and used for lighter applications. You can usually find identification markings on the pipe, or ask your plumber for details.

What is the life expectancy of plastic pipes?

Most plastic pipes last between 50 and 100 years, depending on the type and conditions. PVC and CPVC pipes typically last around 50 years, while HDPE can last over 100 years with proper care and maintenance.

Are plastic pipes less likely to burst?

Plastic pipes are generally more flexible and can better withstand pressure changes than rigid metal pipes, making them less likely to burst. However, extreme cold or improper installation can still cause damage, so proper care is essential.

Does a plastic pipe reduce flow?

No. Plastic pipes typically have smooth internal surfaces, which facilitate good water flow. Some plastic pipes provide better flow rates than older metal pipes that may have corrosion buildup inside.

Are plastic pipes more likely to freeze?

Plastic pipes are less likely to burst from freezing because they can expand slightly under pressure. But freezing can still cause blockages, so insulating your pipes during cold weather is important to prevent damage.

What if I Want to Know More About Plastic Pipework Cost Efficiency?

If you want to learn more about how plastic pipework can save you money and improve your plumbing system’s reliability, we’re here to help. Because plumbing problems can't wait, All Needs Plumbing doesn't charge a fee to come out and fix them. We offer same-day service 24 hours a day, 7 days a week, and a $150 discount on hot water system installations for seniors.

Whether you’re a homeowner or run a commercial establishment, we’ll guide you through the best options and handle the job professionally, so you don’t have to worry about a thing. Give us a call today and let’s get your plumbing sorted the right way.

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