Folks, could anyone tell me what the part number/description is for the
fitting that screws into the bottom of the PIK-20 ballast dump tube for
filling. My PIK's ballast system appears to be in good repair but I can't
seem to find what fitting to use. I'm sure it is some kind of metric
fitting w/25mm or so threads?

Thanks.

Glen Kelley PIK-20 "HL"