
We have very high water pressure so I bought this to fit between the pipe and the shower head. Similar products had negative reviews stating that in the US you need NPT threads instead of IPS. Well this valve screws onto my MOEN shower head perfectly and I live in the US. Including Teflon tape. I don't use it to turn it off completely so I won't comment on it. It works well enough for throttling, although it's very "touchy" for a 1/4 turn valve. That's the nature of the 1/4 turn. Once you set a good pressure, you don't have to touch it anymore. I'm happy.

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