I have a posiden Xstream of a friends that when the purge is pushed it really, REALLY purges alot of air. I have not dove this thing yet and wanted to see if this was normal. I checked the output pressure of the 1st stage and it is set at about 140psi. The burst of air is short but powerful, almost like getting direct tank pressure air. The thing will blow your cheeks out like Louis Armstrongs cheeks! Help please, Bell47.