Older homes near Downtown Colton and Valley Blvd often have old cast-iron sewer lines. Tree roots love to grow into these old pipes looking for water. Once roots get in, water backs up slow at first, then all at once. A customer near Mt. Vernon Ave called us last month. Their shower backed up every time the washer ran. That's a classic sign of a main line clog. In our experience, that pattern almost always points to roots. Clay soil across the San Bernardino Valley also shifts pipes over time. This cracks joints and lets roots sneak in faster.[1] Waiting on a clogged sewer line almost always costs more. We'd rather clear it now than deal with a flooded yard later.