Everything else does, why don't they?
Its a foam just like a normal extingusher.
Acually some cargoholds have a Gaseous fire suppression system. his system uses inert gases to extenguish the fire. Carbon Dioxide is also common. I know that one of these gases is called Halon. You might be able to use google to find out more.
It's hard to understand your situation and what it is you are actually trying to do. However, and it's expensive, you can swage the joints. However, this is not often done because of two factors, cost and reliability. How are you going to make a joint if you can't shut off the water? I'm really confused. If you live in a condo, why is it you can't shut off the water to your unit? What happens if you spring a leak? I'd believe somewhere in your unit is a main shut-off valve; I'd recommend looking for that. Good luck. :) ADDITIONAL: Tom Sullivan's answer is correct, Shark Bites at Home Depot or Gator Bites at Lowe's. They work well with copper pipes. I've used them to make temporary connections from PEX to Copper, only until I get around to making final sweat fittings designed to convert PEX to Copper. However, these types of connections are not designed to go over fittings like Tee's and Elbows, rather, they are designed to go over the cut ends of copper pipe. If you have an existing line, you can cut it further away from the valve. This will give you room to sweat a Tee in and continue with whatever you are attempting to do. Sounds like you are trying to add an additional line at your water shut off valve. I know it is impossible to sweat a fitting that has water in it, and your concern for damaging the valve is legitimate. However, without seeing what you are trying to do, again, all we can do is guess. Again, good luck. :)
