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Thanks for the info eesakiwi, Yeah the tanks were pre-pressurised on the dry chem side. "im thinking the CO2 bottle is to overcome tank side pressure to actuate the relief valve to empty the tank.
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Hey everyone, so I had someone give me some Pyro-Chem PCI-50BC extinguishers "7 of them with a handful of other smaller extinguishers"

I've gathered some information as to how they are activated...

Hopefully the weather is nicer there then here lol.
I'm just next to Elkhart couple blocks haha

Hello everyone
New here to the forum, just found it last night. Seems like the best place to get some very useful information and be able to stay safe while I'm at it lol.

Have been scrapping...