Hey a_roach, I took one of those apart at work today because of your post. I had to see for myself. Looking at Dormont’s website, they call that device their “Safety Quik Quick-Disconnect Valve”, as you probably knew.
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Sure enough, it did NOT have that plastic insert (serving as a thermal shutoff) such as those we’re used to finding in the nipple of a basic quick-disconnect.
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I’m guessing the thermal shutoff is incorporated into the valve body somehow. Dormont’s website and literature isn’t very helpful in that regard.
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I’d recommend going back with a basic quick-disconnect (Dormont calls that their “SnapFast). That’s what we’re doing. They’re simpler, cheaper and easier to get apart. I had to use tools to persuade that Safety Quik valve apart. They don’t take grease buildup very well since the grease tends to begin resembling glue.