Fitting identification
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Have you **seen this type of pipe fitting**
I’ve never seen it, but it’s definitely not a pipe fitting; what was said on the second floor is probably correct.
Micro-resistance slow-closing check valves are generally used in the outlet pipelines for circulating water and fire-fighting water
It’s not a fitting; it serves a control function.
It doesn’t look like a pipe fitting; it seems more like a valve
Thank you all **\ud83d\ude4f; I’ve learned a lot