Why Would You Choose Poly Pipe Over PVC?
When comparing PE vs PVC, Poly Pipe (PE/HDPE) is the better choice for long-term, high-pressure and industrial applications — thanks to its UV stability, chemical resistance, flexibility and 100-year design life. PVC suits short-term, above-ground or low-pressure jobs (typically small-diameter irrigation or temporary plumbing), where upfront cost and installation speed matter more than longevity.
At Advanced Piping Systems, we stock Poly Pipe products because we know they are the most versatile, durable and sustainable products on the market. But what are some of the other types of pipe used? How do they differ from Poly Pipe, and what are the benefits and disadvantages of these other piping materials?
Comparing PVC with PE
One of the most common piping materials is polyvinyl chloride, commonly known as PVC.
It’s a thermosetting plastic derived from vinyl. Poly Pipe (also known as PE) is derived from the base material HDPE — a flexible, elastic thermoplastic. Here’s how the two materials compare on the factors that matter most in industrial use:
|
Factor |
Poly Pipe (PE/HDPE) |
PVC |
|
Material |
High-density polyethylene — elastic thermoplastic |
Polyvinyl chloride — thermosetting plastic |
|
UV resistance |
UV stable, suits Australian conditions |
Not UV resistant, the sun turns PVC brown/yellow and brittle over time |
|
Chemical resistance |
Good across acids, alkalis, and most industrial chemicals |
Limited |
|
Flexibility |
Elastic: absorbs impact, abrasion, and ground movement |
Rigid: prone to cracking under stress |
|
Jointing |
Fused or electrofused |
Rubber ring joints or solvent glue (prone to slipping, cracking) |
|
Lifespan |
Proven to last 100+ years |
Shorter service life, especially outdoors or in unstable soils |
|
Installation speed |
Slower: requires butt fusion or |
Faster: rubber ring joints push together without equipment |
|
Best suited to |
High-pressure, industrial, mining, |
Small, short-term or above-ground jobs |
Although poly pipe takes longer to install, as it must be fused with butt welding or EF welding equipment, it’s a permanent solution proven to last over 100 years. That’s why poly pipe is the preferred choice on mining sites, where maintenance teams, processing plants, and engineers need pipework they can rely on for the long term. PVC is typically only seen on mining site camps in semi-permanent, above-ground structures such as drains and ablution areas, where it serves as a short-term solution.
Comparing concrete pipes with Poly Pipe
Another material often used for large industrial piping projects is concrete.
Poly Pipe is a much lighter-weight product than concrete or concrete-lined steel pipes, which makes it easier to transport, manoeuvre and install.
Concrete-lined steel pipes and PVC pipes also cause major problems when being fitted, as they are more difficult to join – relying on rubber seals or glues to fill gaps, which often leads to pipes sliding out of place or loosening, causing cracks, slips, breaks and splits in pipelines.
That’s why in the piping industry, we often tell people that if you can’t fuse it, you’ll lose it…or fuse it, don’t glue it!
Another downside of concrete pipes is that they can change the pH of water because of the chemicals in the concrete. Because of this, concrete pipes may require recoating of the internal pipe service over time as it pits and breaks down.
Fully welded systems, which are only viable using poly pipe, don’t require thrust blocks or glues to stop pipes from coming apart at rubber ring joints, circumventing these issues.
Poly Pipe can also be directionally (or horizontally) bored into the ground, providing a no-dig solution that can not be replicated in the installation of other materials.
When might you use PVC instead of Poly Pipe?
When it comes to PVC, it’s important to consider the size and longevity of the project.
For smaller jobs that only require a short-term solution, such as above-ground plumbing or low-impact irrigation systems using pipe under 50mm, PVC is fine.
Some skid-mounted water treatment systems use PVC in sizes under 90mm. This is acceptable if the pipe is housed inside a pump or filter shed. However, it won’t have the elasticity Poly Pipe provides, and as such, it may hammer with changes in pressure. We know extreme pressure changes can crack PVC pipe elbows or threads under these circumstances.
The only other circumstance where you may choose to use PVC over Poly Pipe is in the case of using rubber ring jointed 100mm and 150mm pipes for water mains.
PVC works well in these cases as rubber ring joints are very quick to push together and don’t need any additional equipment, which makes them easy to install and hard to beat on price. Having said that, PVC is certainly not fail-safe for long-term use, particularly in unstable soils.
It’s also important to remember that PVC is not commonly trench-friendly (where many pipes and conduits run next to each other within a trench), so it’s often not the best solution for piping in camp areas or short-term irrigation for this reason.
With all this in mind, the initial savings made by using PVC are often overridden by the need to reinstall it more regularly than Poly Pipe.
If you still have questions or would like assistance with selecting the right fitting or product for your next project, contact us today.
