kenmac
Super Member
- Joined
- Feb 13, 2005
- Messages
- 9,815
- Location
- The Heart of Dixie
- Tractor
- McCormick CX105 Kubota MX 5100 HST, Kubota ZD1021, Kawsaki Mule 4010 trans 4x4
pulling a vacuum and sustaining a vacuum serve different purposes... however, the process of both yields important information about the conditions within your system. Also, a high pressure test is just as importation as a low pressure test... You can't exert (test) the forces of "normal" operating conditions on the piping network by only performing a low pressure test.
Manufactures will explicitly specify the micron level to which they require to achieve their warranty requirements.
If I were to pull a vacuum . I would hope I could sustain it..