You are definitely not the only one having this type of problem. I
have a 392 which was bought 11/93. The first block was replaced 8/8/94 and
the second block 1/30/97 - always the 11 port valve. Like others - I never
had this problem on my 380A or 391. I'm holding my breath waiting for the
next one to go. Of course, trityls give no hint of a problem. Since one of
the symptoms of this problem is increased usage of 12 vs 11, I always
change both bottles at the same time and keep an eye on the levels relative
to each other.
Hopefully, this discussion will remind ABI that there is a need to
solve this problem. Scottie
Scottie Adams aka Pamela Scott Adams
Molecular Biology Core Facility
Adirondack Biomedical Research Institute, Inc.
(formerly the W. Alton Jones Cell Science Center)
10 Old Barn Road
Lake Placid, NY 12946
Phone: 518-523-1276
Fax: 518-523-1849
Email: scottie@cell-science.org
http://www.cell-science.org/mbcf