Normally this pressure is 0.25 inches of water column, but is often elevated or lowered as the process necessitates. Isolators need to be periodically leak tested to be sure their integrity and forestall escape of your decontamination agent. Leak testing can be done by different procedures together with pressure https://www.tumblr.com/tailinscitech/805881091208724480/applications-and-benefits-of-tailin-containment?source=share