As Larry said, it’s the 4" diameter that is the problem. Now, I saw that they make 3.5" PVC, but it is very uncommon. I couldn’t find any when I was doing my project. If you can get some of that, then go ahead and use 3.5" PVC.
As Larry said, it’s the 4" diameter that is the problem. Now, I saw that they make 3.5" PVC, but it is very uncommon. I couldn’t find any when I was doing my project. If you can get some of that, then go ahead and use 3.5" PVC.