Checked customer request for winterization. The customer had three bathrooms that he needed winterized. There were 9 toilets, 9 lavs and 9 showers all together. Presented customer pricing to winterize the bathrooms. After pricing was approved the work was scheduled. The work will be performed on a later day when all required antifreeze is acquired. 11/30/22: Performed work as proposed. I drained the bathroom through the existing boiler drains. I flushed all of the toilets and vacuumed out the tanks and traps. I blew out the lines with an air compressor to the best of my abilities. I shut off the water heater. I filled all of the traps with antifreeze. After the antifreeze was put into the traps I taped off the toilets and sinks. I checked for leaks on all other plumbing that had been installed by CPI. There were no leaks when last checked. The customer was happy with the winterization and that there were no leaks. The customer understood that we winterized the building to the best o