What is the maximum vacuum pressure (gauge) you use while pumping. I read that insintex go from -20hg to -30hg for an hour long I start with -5hg--10hg for 10 minutes en than -10hg- -15hgfor 20 minutes and than -10hg--20hg for half an hour.
Please share us the the -HG your gauge.
Please share us the the -HG your gauge.