A sudden change in weather causing temps to drop into the low 20's overnight caused me to need a replacement back-flow preventer. Sprinkler Supply Store to the rescue! They had exactly the Conbraco 1" Vacuum Breaker I needed. And while it initially looked like it might be several weeks before I might get it (due to stocking & supply issues thanks to COVID), it actually arrived in just about a week. On-line ordering was a snap, and payment via PayPal was equally easy. What more could I ask for? Thanks to Denny & the Sprinkler Supply Store team for getting me just what I needed.