Nicely done. I need to do something similar to protect a couple of softener lines that are exposed.
Looked it up and its too pricey. The valve is almost 3 feet above the lowest point in the system, so it drains nicely. Coldest ever here was 4 degrees F. Two other covers like this one protected the valves. Have a cutoff ball valve I can close if it gets below 20. Will also have to drain the electrical controlled valve too.Possible to add a solar powered heat source?