First of all I don't know much about HVAC, but I learn pretty fast.
I have a Rudd Silhouette, the unit is in my attic. The PVC pipe going into the unit is leaking at one of the elbow joints. I am not sure if this is condensation or an actual leak, but it appears like a leak, but it appears to only happen when running my air during the summer. Is this common? If not how can I fix this? Can I put some sort of seal around their or something to protect it from doing this, insulation of some sort?