Hi Max, I've always found Randal Bogathy of Dirt Cheap RO to be very helpful with such matters. His email is Rbogath@aol.com drop him a line and see what he has to say! Hope that helps! Rich Max Gallade <mgallade@hotmail.com> wrote: Hi Group, It's been quiet here so I figured I ask you a technical question: I've been operating my R/O unit for almost 3 years without changing the original membrane. The flow of produce water really slowed down lately. I got a new membrane last week. I pulled the old membrane out of the housing and pushed the new one back in. I reconnected all the hoses but don't get any pressure or produce water. So far I've operated the unit no longer than a 1/2 hr . I don't want to let it run for a longer time when I'm not there to watch it. Should I let it run longer? Do I need to vent the housing somehow? Did I do anything wrong? Just wonder. Any tips are greatly appreciated. Max ----------------------------------------------------------------------- -- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader ----------------------------------------------------------------------- -- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader