When we think drip irrigation we typically think of black, flexible, easy to work with, poly tubing. Although black poly tubing is still very popular today. The real true tested product of the Southwest is PVC.
polyvinyl chloride also known as PVC is a product that has been in heavy use since the early 70’s. Most of those systems are still in use today. That just shows you the longevity and quality of this material.
Black poly tubing has an average lifespan of about 8-12 years before you get your first break. Black poly will end up becoming very dry and brittle. Much like a car tire, poly tubing will dry rot. Once it becomes old and brittle it will not reverse back to new. This is why we try to discourage most customers from using it. It only buys you a temporary irrigation system. PVC is a product that you could get 50 plus years out of. Although most homeowners don’t stay in their house for 50 plus years it’s more of an investment for your beautiful plants.
There are a few grades of PVC that are on the market. The first one, is called class 125. They call it that because it can only handle 125 PSI. The second one on the market is class 200 PVC. Again, it can withstand 200 psi. Although these products are rigid and strong for water pressure they do have their issues under stressful situations. Schedule for the PVC can handle up to 400 psi. That is an outstanding number. Most city water hookups have a PSI rating of 60 to 90 psi. The schedule 40 pvc pipe is thicker walled, rigid, still easy to work with, and will last for years.
