With so many quality non-filter pipes available in every price range (you always have to shop selectively to
get anything good, but there are plenty available) I'm not sure why you would buy a 9 mm filter pipe you
don't intend to use with the filter. There are ways around it, but why bother? I know how it is to become
infatuated with a pipe, but this is my rational response; see if it works for you.