Homeowner worried about water heater making popping noises when no water was being used. Shane was out last week and flushed out. Explain to homeowner that that is not a permanent fix and it might not work to keep the noise down. Also explain to homeowner the reason each came on we nobody was using the water because the temperature outside dropped the temperature in the tank low enough for the thermostat to kick it on. She understands now on way to meet noises without being used. Also noticed upstairs guest bathroom sink was really slow draining due to AC condensation. Gave estimate to snake out. Homeowner has scheduled for next Thursday to snake it out and do home inspection.