I thought I would share this website with anyone interested. There are a variety of courses you can take for free on topics ranging from plumbing, water quality, drains, HVAC, backflow prevention, etc... There's usually short videos or slides and then a series of questions afterwards. After completing courses you get points which you can redeem for things like sweatshirts, lunchboxes, and camp chairs. I think it's kinda cool because you learn something, you can get free stuff, and Watts gets advertising so everybody wins. Still worth a look even if you're not interested in the swag because the courses are actually helpful if you're in the trade. Also I'm not affiliated in any way, just like to learn stuff.