RE: pipe resistance
i did a generic measure with the calips i put it around the finger trying no to distort the 1 oring that was in the housing behind the flange and it measured like 1.0156 in inch not mm so do i go with a 1in in od as i figure as nu tighten it down it will flatten ? and there has to be a diff between black orange white orings i seen 1 place had orings that would withstand 1200 f hmmmm looks like i wait a few more days b4 i get to play or as the elmira boat club would say test their rigs as they dont take theirs out to have fun.