Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Bad Valve
Review: Don't buy this valve! I installed seven of these valves in my yard. I have had five failures, all the same way. The housing over the anti-siphon valve is too thin. After sitting out in the sun for a few years it WILL fail. When it does, you get a huge gusher of water. My landscaper has seen the same thing. Buy any valve but this one!
