Customer had 2 inch pvc line between water heater and hvac unit backing up and flooding the basement. Attempted to run drain cleaning equipment through the line. Tried many times with various heads and methods to clear it. Kept getting stuck at the 10-12 foot mark. Line is full of water so it’s hard to pull anything back, but pulled back what appeared to be dirt on the line one (picture attached). Was able to restore some flow when water is introduced in the system after cleaning and didn’t have a full backup, but it started to. This will likely only allow temporary flow and the recommended work at the bottom needs to be done as soon as possible. Cleaned Ptrap under kitchen sink as a courtesy item. Recommendations: Have a certified hvac technician tie in the upstairs condensate going into the drain into one of the two condensate pumps by the hvac unit by the drain. Then run flexible tubing for each pump to the mop sink across the utility area in the wine room.