Kitchen sink for unit 79 filled with water. Went into storage room for unit 79 and found a 2” ABS line with some cleanouts on it. Removed one of the cleanout plugs and found a huge slug grease right at the clean out. Pulled out the grease and snaked with small handheld machine entire length of cable. Pulled back and found some grease on the cable. Recommend having 2” ABS pipe camera inspected and jet washed. Went to unit 79 to run the sink, they still have no water from the freeze ups.