I use these type of fittings: http://www.imperialsupplies.com/grp198.shtml Make sure you use the insert. OEM has used push type fittings for the past 10 years or so because they are easy to assemble. However they can be difficult to disassemble and I'm not sure how good they would be for vacuum. http://www.imperialsupplies.com/grp299.shtml

Last edited by crenwelge; 09/05/2010 6:40 AM.