So HDPE stands for High Density Polyethylene. It's a type of plastic and it's incredibly handy for float centers. Float On switched to using this any place they previously would've used wood in their building materials. 

Graham and Ashkahn break down exactly what this miracle product is, where you can buy it, all the different uses it has in a float center, and some special tips and tricks of getting it just the way you need it.