Red Green wrote:
Use ball valves.

OK, now that that's out of the way...

I Googled about installing them upside down like in a basement. Saw
pros & cons. Mostly about it promotes sediment collection messing up
the operation. The ones I'm using are 1/2" & 3/4", one hot and one
cold. There are no flow direction arrows on them.

What's the feel from you folks on upside down installation from actual
experience?

It's really none of my business the orientation of a gate valve, but I am
against same-sex gate valve marriage.

Jon