Several people mention the white star valve for the Isis - it is critical and must be facing the right direction. Also, all silicone parts must be seated securely, or there is no suction. When I got my Isis, I had a hard time getting suction to start, mostly because of accidently touching the edge of the petal part and disrupting the suction, but also because the parts just didn't seal together right away without being wet. I found Isis that after I'd used it a few times it tended to go together better, and I had suction right off the bat. I originally had to post to the pumpingmoms list several times to figure out how to work the thing, but once I worked it successfully once, I never had trouble with it again! I thought the pump worked well, and I could pump just as much with it as my PIS, but even the one hand design was tiring, and it of course took at least twice as long to pump both sides! Jennifer Tieman Family Physician Mom to 4, including my toddler nursling Caroline Rose *********************************************** To temporarily stop your subscription: set lactnet nomail To start it again: set lactnet mail (or digest) To unsubscribe: unsubscribe lactnet All commands go to [log in to unmask] The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(R) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html