3d heat pump installed today. all went well. was able to get SH and SC to about 15 on both, although suction press. was around 85 which i thougt to be a little high??? my question is in school we put a wet rag around the service valves while soldering next to them, and we actually poured a little water on the rag periodically to keep from damaging the seals in the valve. So i've done this on my few installs. today i had a hard time stopping a pin hole leak on the bottom of suction line with the rag on it. I finally sealed the leak with no wet rag because i couldn't get the line hot enough with it, so i was wandering is it necessary to use a wet rage to protect service valves?