This is actually my third but last purchase of these devices. I've been using them for several years with no problems. Apparently they changed the design of the DI cartridge to a cheaper plastic. With the latter I had problems with the top part coming loose under pressure and leaking everywhere. The o-ring is in place, the lid is tight, when I come back it's leaking everywhere. I have a pressure control box in my water system and my water pressure is within specifications. I am deeply disappointed that they ruined a perfectly good product. Never leave this device unattended when it's pressurized or you'll have to clean up the mess.
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