Why does the drain keep slowing down?
A repeat clog often has a cause beyond the buildup that was cleared, such as a low spot, a defect or roots.
San Juan, Texas
A drain that keeps slowing in San Juan may sit on a line from the 1920s or from a newer neighborhood. A drain that slows again after cleaning needs a fresh look. Note how long the improvement lasted and whether one fixture or several are affected.
EPA sewer inspection guidance says inspection can identify where grease and debris accumulate or where roots intrude into a sewer. For a house line, that means finding the cause instead of repeating the same cleaning.
In an older San Juan house, ask about age and material. In a newer one, ask whether an inspection shows a sag or a joint problem.
A repeat clog often has a cause beyond the buildup that was cleared, such as a low spot, a defect or roots.
Often. One slow fixture can point to a short branch line. Several affected fixtures can point farther down the line.
Notes on when the problem started, which fixtures are affected and what earlier cleanings changed.
Yes. It frames the age of the housing, though the inspection of your own line matters more.
Tell us about the affected drain, what you have noticed, and whether hydro jetting may suit the line.