Generally this stress is 0.25 inches of drinking water column, but might be elevated or reduced as the procedure necessitates. Isolators need to be periodically leak tested to make sure their integrity and prevent escape in the decontamination agent. Leak testing can be achieved by a variety of procedures https://tailinscitech.wixsite.com/tailinscitech/post/applications-and-benefits-of-tailin-containment-isolator-for-handling-high-potency-materials