Leaking home AC component? I bought a dry vac to unclogg the pipe. But how can...

I bought a dry vac to unclogg the pipe. But how can I tell which pipe to remove?
Answers:    it should be a 3/4 inch pvc pipe. you may need to cut it, vac it surrounded by both directions and install a new 3/4 inch coupling.
HVAC Tech.: I use compressed air To blow the drip lines out. However you could create other problems doing this if you aren't thrifty. Could I suggest you call a tech. and have the system checked over for rust and slime. He can supply a chemical strip to eliminate the problem for up to a year. A few $$$$now or lot of$$$$$$$later. the ONE THATS LEAKIN'... IF U CAN'T AND U WANNA B CHEAP ASK A NEIGHBOR OR JUST CALL YOUR AC PROVIDER!!:)