I rotated this photo to be upside-down so the lettering was visible. This is the shutoff that I think is not working at my friend's house.
Does it look like there's teflon tape or pipe white thread sealer closer to the tee? Trying to figure out what this thing is so we can replace it. Says 1/2 so friend thinks that means 1/2" and the line coming out the other side looks 1/4" to me.
View attachment 47767
or does it look like it has reducers attached to it? Anyone know what can be used to replace this? And best and safest way to clean up that copper?