Plastic pipes are increasingly being used for plumbing applications in the U.S. and around the globe. According to market research, the global plastic pipes market is expected to reach $85.5 billion by 2022.[1]
As a plumber or general contractor, you likely use plastic pipes all the time for both plumbing repairs and new builds. But, is plastic the best type of material for plumbing? Are there any drawbacks to the PVC pipe trend?
Let’s take a look at what the advantages of plastic pipes are to understand why these pipes are still so widely used, what types of plastic piping are available today, and why traditional pipe materials such as copper and steel are still worthwhile.
What Are the Advantages of Plastic Pipes for Plumbing?
Plumbers started using plastic pipes on a wide scale in the U.S. in the 1950s and 1960s. One of the biggest reasons for the shift to PVC (polyvinyl chloride) over the following decades is convenience—using plastic pipes makes a plumber’s job much easier.
This is because plastic pipes have several advantages over metal pipes.
- Easier to install – They weigh less than metal pipes, and it’s easier to cut plastic pipes to the right size than it is to saw a copper or steel tube.
- Resistant to corrosion – With PVC pipes and fittings, you don’t have to worry about the pipes corroding over time as water and household chemicals flow through the system.
- Can be used with metal pipes – Unlike the problems you’ll create by connecting different metals, you can safely connect PVC pipes to metal pipes without worrying about triggering destructive chemical reactions.
Should You Use Plastic Piping for All Your Renovation and Building Projects?
If you work in the industry as a plumber or a general contractor, you may prefer PVC pipes, or other types of plastic, because they are easier to work with. Most residential consumers prefer them too. With a long service life, corrosion resistance, faster installation, and moderate costs, PVC piping is often a more efficient option for bathroom and kitchen renovations, and for new builds.
When it comes to potable water, as well as sewer and drainage applications in the home, consumers appreciate the low maintenance and replacement costs of a plastic pipe system.
Still, plastic pipes aren’t perfect, and there are unique advantages of both copper and steel pipes that you don’t want to overlook.
Copper pipes vs. plastic pipes
Copper pipes vs. plastic pipes- While more expensive, copper will last longer if the water running through the pipes isn’t acidic.
- For tight spaces, copper pipes may be your best bet as you can install small-diameter copper pipes behind thin walls or in small spaces and still count on a durable, long-lasting pipe.
- As a natural metal, copper doesn’t contain any chemicals like plastic pipes do.
On the other hand, copper pipes are noisier than plastic pipes. Also, if the water is acidic, copper can corrode over time.
Steel pipes vs. plastic pipes
- While plastic won’t corrode at all, galvanized steel and stainless steel pipes are corrosion-resistant as well.
- Steel pipes also offer superior durability.
- Stainless steel in particular is easy to clean.
The biggest issue with steel pipes is they are more expensive to install and replace than plastic.
Different Types of Plastic Piping
As the plastic pipe market continues to grow, new innovations in plastic are always being developed—in order to make the best pipe and fittings choices for the job, you’ll want to stay on top of the different types of plastic pipe available.
PVC or polyvinyl chloride – PVC pipes[2] are often used for the main supply line in the house because they are strong enough for high-pressure water. However, PVC can warp when temperatures exceed 140°F. It’s not the best choice for kitchen drains because the hot water from washing dishes could damage the pipes. Also, some PVC pipes that aren’t specifically designed for potable water can leach chemicals.
PEX or cross-linked polyethylene – These are the most frequently used plastic pipes. PEX pipes are flexible, and they can handle high water pressure. They are also used for both hot and cold water.
CPVC or chlorinated polyvinyl chloride – These are PVC pipes treated with chlorine. These pipes are often used in industrial applications because CPVC is flexible enough to handle high water pressure and high temperatures. It shouldn’t be used underground, however, as it can crack if frozen.
HDPE or high-density polyethylene – If you’re looking for a durable plastic pipe, HDPE is a great choice. It’s flexible and can stand up to high pressures. It also helps to conserve water pressure because there is less friction in the system as the water moves through. When compared to PVC pipes, HDPE is more heat- and abrasion-resistant.
If you have any questions about plastic pipes, fittings[3], or what tools you'll need to work with any type of plumbing system, contact us today for help.
[1] https://www.globenewswire.com/news-release/2019/05/07/1818555/0/en/PVC-Pipes-Market-to-Reach-85-5-Billion-Globally-by-2022.html
[2] https://www.zoro.com/pvc-pipes/c/5794/
[3]https://www.zoro.com/pipes-valves-fittings/c/33/
Product Compliance and Suitability
The product statements contained in this guide are intended for general informational purposes only. Such product statements do not constitute a product recommendation or representation as to the appropriateness, accuracy, completeness, correctness or currentness of the information provided. Information provided in this guide does not replace the use by you of any manufacturer instructions, technical product manual, or other professional resource or adviser available to you. Always read, understand and follow all manufacturer instructions.