I am curious about brass fitting threads, I can see that they have inch fraction labels but they don't really match any thread, except the tapered ones that match the steel pipes and some copper fittings. But the compression fine threads don't seem to match any existing thread.Does anyone know why are they made like that?
Some alarms are also a poisionious gas detector such as carbon monoxide and other toxic fumes..if three went off at once I would have the fire department come test the air for you..they will do it free..but do not call 911 or thier emergencey number unless someone has came overcome from something..they will test the air free and around appliances etc..any type gas also will set them off..if the air is clean..then I would say something is wrong with the wiring they are wired into for 3 at a time is not normal to go off unless there is a problem..You are not going to have 3 faulty smoke alarms at once
Most are also sensitive to aerosols, steam and any other form of spray/mist look round do you have any of them? Also cooking can set them off.
I think dust and muck can set them of sometimes. You could buy a can of air (used to blow dust of electronic stuff) and see if you can get the dust out to stop it from going off unnecessarily .Or you could buy a new one and get someone to install it. It's up to you.
I don't know that they actually do training for this. At least I've never heard of it. Can't you just read the side of the extinguisher? There should be how-to directions there. If you're reaaally worried, call your local fire department and ask if they have any training programs for fire safety. Probably the fire extinguisher would be covered in something like that.