Hi,

I have a fairly severe case of my front heater valve leaking hot water
by and constantly heating my wife and I up... at 30C it's kind of
sub-optional!  lol.

I want to do a "quick fix" and put a ball valve in the  heater hose.
I've heard you can do that behind the glove box.

What is the internal diameter of the heater hose?

What kind of valve would I need?  Something that would take hose clamps.
  I live in a small town and the local hardware store didn't have
anything suitable.  Either solder on (copper plumbing) or PEX crimp on.

Any pointers are appreciated.

Thanks,
Steve Williams