I have Weathermatic valves controlling my irrigation system. You won't find Weathermatic at Home Depot so I headed over to YouTube to do a little research. Right away I found some VERY helpful videos from Sprinkler Supply that pointed me at how to repair the valve and most importantly, how to identify the difference between "old" and "new" Weathermatic valves. Armed with this info I went shopping for parts. Sprinkler Supply had everything I needed at the best prices I could find. The parts were also CLEARLY identified as for "old" or "new" Weathermatic valves. A few days later, the parts arrived and dropped right into my "old" values. Everything worked perfectly. I was very happy and will do business with Sprinkler Supply again.