The earliest signs that your sewer line needs attention are usually subtle — a single toilet that’s slower than it used to be, a faint sewer smell near a floor drain, or a drain that seems fine most of the time but backs up during heavy use. These early signals are easy to dismiss, but catching a developing sewer problem before it becomes a failure is almost always cheaper and less disruptive than responding after the fact.

Signs You Need Maintenance (Catch These Early)

Maintenance-level issues are those that suggest buildup or minor restriction in the line, but haven’t yet caused a full backup or visible damage:

  • One or more drains that are slower than usual, especially in a kitchen or bathroom that gets heavy use
  • Occasional gurgling from a toilet or drain after another fixture is used — a sign of partial restriction in the main line
  • A faint sewer odor inside the home that comes and goes, particularly near floor drains or basement bathrooms
  • Drains that were cleared a year or two ago but are starting to slow again — recurring clogs suggest the underlying condition (grease buildup, root intrusion) wasn’t fully resolved

Signs You Need Repair (Don’t Wait)

Repair-level situations involve either a blockage severe enough to cause backup, or physical damage to the pipe itself:

  • Multiple fixtures backing up or draining slowly at the same time — main line is compromised
  • Sewage surfacing through a floor drain or backing up into a tub
  • Soft or soggy ground in the yard above the sewer line, or unexplained patches of unusually lush grass — may indicate a leaking line irrigating the soil
  • A persistent sewer smell even after traps are primed and no obvious blockage is present

Why Colorado’s Conditions Matter

The Denver metro’s expansive clay soils shift with moisture — the freeze-thaw cycles each spring and the wet-dry swings through summer create ongoing ground movement around buried pipes. In homes built before the 1980s, clay tile or Orangeburg sewer lines are still common and are particularly vulnerable to joint separation and cracking over time. Root intrusion from the large deciduous trees common in established Denver-area neighborhoods is another chronic issue — once roots find a joint gap, they expand and can eventually cause a full blockage.

Colorado’s very hard water also contributes mineral scale buildup inside pipes, which narrows the flow path and creates surfaces where organic debris accumulates more easily. This is most noticeable in homes on municipal water supplies that don’t use a water softener.

The Most Reliable Diagnostic: Camera Inspection

The only way to know definitively whether your sewer line needs maintenance, repair, or replacement is to look inside it. A sewer camera inspection runs a small waterproof camera through the line and shows — in real time — what’s actually happening: root masses, scale buildup, cracks, joint offsets, pipe sags (bellies), or debris accumulation. This takes the guesswork out of the decision and ensures the repair method matches the actual problem.

Proactive Inspection for Older Homes

If your Denver-area home was built before 1980, a proactive sewer camera inspection is worth scheduling even without symptoms. Clay tile and Orangeburg sewer lines — both common in pre-1970s construction — degrade predictably over time, and the expansive clay soils across the Front Range accelerate that process. Getting eyes inside the pipe before a problem develops gives you options: a targeted pipe lining repair now is far less disruptive and expensive than responding to a collapse or full backup later. Many homeowners who get an inspection out of curiosity discover that their sewer line is in better shape than expected — and that’s useful information too, because it means you can stop wondering and address other home priorities instead.

Done can schedule a camera inspection as a standalone service or as part of a drain cleaning visit. Visit our sewer services page to learn about repair and inspection options, our drain cleaning page for maintenance service, or our emergency drain cleaning page if you’re dealing with an active backup right now.