Hi, This past summer we installed an automatic water timer to our exterior spigot (sillcock) so we could water our garden more efficiently using drip irrigation. It worked great at first, however now - after only a few months - a constant drip leak has developed from the weep hole of the spigot. I did some searching online and learned that the spigot I have is not designed to be left on constantly. The manufacturer (Arrowhead) says that if left on for long periods (over 12 hours), it can cause the o-ring on the check assembly to wear out and fail. This is confirmed here (http://champion-arrowhead.com/media/wysiwyg/PDFs/Frost-Free_Hydrant_Guide.pdf) where all of their anti-siphon spigots say, “Faucet should not be pressurized for more than 12 consecutive hours. Not designed for constant pressure applications (i.e. sprinkler & drip timers, “Y” Shut offs... )." However, the only way for an automatic water timer to work is for the spigot to be left on. Otherwise, we would have to manually turn the spigot on and off before and after each water time, which defeats the purpose. So there must be a solution to this. For reference, here are the products we use: Spigot: Arrowhead Arrow-Breaker frost free hydrant (465-10QTLF) (http://champion-arrowhead.com/index.php/arrowhead/frost-proof-wall-hydrants/460-series-arrow-breaker/465.html) Water timer: Melnor HydroLogic 4-Zone Timer (https://www.lowes.com/pd/Melnor-HydroLogic-4-Zone-Timer/<personal data hidden>) Through my research, I also found a product specifically designed for this problem and it is specific to Arrowhead sillcocks (See “Spigot Master” here: https://spigotmaster.com/about-spigotmaster/). However this Spigot Master product is essentially designed to by-pass the built in anti-siphon of the sillcock, which I think is against code and a bad idea. But it makes me wonder if this problem is specific to the design of the Arrowhead anti-siphon and if another manufacturer’s anti-siphon sillcock might work perfectly fine if left on constantly in the summer months. So my question: how can I use my automatic water timer with an anti-siphon spigot? Should I install a different (non-Arrowhead) anti-siphon spigot (if the problem is specific to the design of the Arrowhead anti-siphon)? Should I install a spigot without an anti-siphon device and then install separate vacuum breakers later on down the chain (like to each of the four hose connectors of the water timer)? Given the number of people who use automatic water timers, there must be a way! Thanks so much!