Approximately how much R22 does 94 feet of 3/8 copper line hold? My system had a leak in the evap coil and it is being replaced this week. Fortunately under Lennox Complete care warranty(parts and labor). The company wants to charge a lot per pound per LB for the R22 charge. Approximately what 3 30LB tanks would cost. My system was factory charged with 10.13 LBS. I assume you have to compensate for the liquid line length. I need to get some pricing for this, but obviously have to know how much my line holds first. Thanks.