Typically this force is 0.25 inches of water column, but is usually lifted or lowered as the procedure needs. Isolators have to be periodically leak tested to be sure their integrity and prevent escape with the decontamination agent. Leak testing can be done by various approaches which includes strain https://louisoipxa.blgwiki.com/2230010/the_smart_trick_of_containment_aseptic_isolator_that_nobody_is_discussing