Znott wrote:

If I wanted to build my own sprinkler value box since it's an odd
size, what materials should I use to construct it? Any thoughts? Any
websites that would help me?


This is a good website for lawn sprinklers, but I didn't find specific
advice about valve boxes:
http://www.irrigationtutorials.com/index.html

Hubby and I shopped for valve boxes for our condo, after locating and
digging out "lost"
valves......they come in all sizes. What dimensions do you need?