System will have to be evacuated (vacuumed) to get all moisture and impuritiesd out after changing parts - after that watch gauges when refilling I would estimate under 3 lbs.
It is attached to the condenser unit. You will need a hexagon wrench and pliers to remove it. Be very careful to avoid moisture exposure to the new air dryer prior to installing. Remove old dryer...
It removes the moisture that builds up in an air conditioning system from constant expansion and compression that creates the cooling effect. If the moisture is not removed from the gases, water...
There isn't really a shelf life for 134-a. As long as you keep your canister in a dry, secure location so it doesn't corrode to the point where you can't open the valve, and as long as nothing...