The longer that wastewater sits, the higher the risk of illness and severe water damage. He showed up and didn't have the part, but came back the next day and was super quick, and fixed a couple of other small leaks I was having for free. They work late hours so I didn't have to take off work early or rearrange plans for him to stop by. Overall good experience, would definitely use them again. I called to schedule an appointment and Residential plumbing was able to get same-day service within a two-hour window. Jeff showed up during that two hour window (though it was nearer the end of that window than the beginning), and confirmed the situation.