I arrived at the customer's home to perform a routine maintenance check on their home's plumbing system. Upon arrival, I found that the drain safety was tripped, indicating a blockage in the drain. I cleared the drain and checked the pressure in the system. The unit was working as it should, and I made the necessary adjustments to restore proper drainage. I also provided the customer with tips on how to prevent future blockages and ensure the proper functioning of their plumbing system.