Found drain only dripping when I arrived. Plugged drain and filled with drain solve. After several minutes I took cap off and allowed it to drain into bucket. Got a good bit of calcium out of line. I then ran a gallon of very hot water through drain. Got slime out of drain. Then with garden hose I flushed drain for several minutes and got more calcium and slime out of drain. Put some more drain solve in and washed it out with 2 gallons of water. Then treated with viper. Note: Took pictures of drain line in case this didn't solve the problem. If it didn't then we will likely need to replace drain line. Water was flowing good at this time