# Finding the Tank, the Field, and the Fault

Septic locating establishes where the tank, the lines, and the drainfield physically sit on a parcel, and troubleshooting establishes which of them is causing the symptom. Both happen before any excavation, because digging to find something is the most expensive way to find it.

- Tank and lid location marked on the surface.
- Line tracing from the building outward.
- Drainfield extent identified where records are missing.
- Symptom traced to a specific component.
- No exploratory digging.

## Why Nobody Knows Where the Septic System Is

Parcels change hands, tanks get buried deeper during landscaping, and lids that were once at grade end up under a foot of fill or a patio. The county file, if one exists, may show a system that was moved during a later repair. So the practical starting point on most properties is that the location is unknown.

That matters for more than convenience. Heavy equipment parked over a drainfield compacts the soil and reduces its ability to absorb effluent, and a machine breaking through an old lid is a serious accident. Marking the system out is a safety step as much as a diagnostic one.

- Buying or selling a property with an unsewered parcel.
- Planning a driveway, addition, shed, or fence.
- Repeated backups with no known tank position.
- A pumping contractor who could not find the lid.
- Wet ground of unknown origin in the yard.
- Preparing for excavation anywhere near the system.

## How We Trace a System With No Drawing

We start at the building cleanout and push a camera with a locating sonde down the line. The sonde is tracked from the surface, which gives us the line path and depth as a marked route across the yard rather than a rough direction.

The route ends at the tank inlet, which fixes the tank position. From there we probe carefully to confirm the lid, and the outlet side gives us the direction of the field. Where the field extent matters, we combine surface evidence, probe results, and any county record into a marked area.

- Marked line route with approximate depth.
- Confirmed tank and lid position.
- Direction and rough extent of the drainfield.
- Identification of the restriction if one exists on the line.
- A clear area for equipment access that avoids the field.

## How a Locate and Troubleshoot Visit Runs

1. **Review what exists** County records, old permits, and anything the owner has. Often that is nothing, which is fine.
2. **Camera and sonde the line** The building sewer is run with a camera carrying a locating sonde so the route can be tracked from above.
3. **Mark the surface** Line route, tank position, and field direction get painted or flagged on the ground.
4. **Report the fault** We tell you which component is causing the symptom, and what fixing it would involve.

## What a Locate Saves You

Locating is a small piece of work relative to what it prevents. Exploratory digging on a septic parcel routinely opens several holes before finding the tank, and each of those holes is surface that has to be restored.

It also prevents the expensive category of accident: equipment across a drainfield, a trench cut through an outlet line, or a lid failing under a vehicle.

We quote locating as its own scope, and if the work continues into repair the findings carry straight into that quote. Call (720) 935-6221.

## Frequently asked questions

**Can you locate a septic tank without digging?**

Yes. Line tracing with a camera and sonde establishes the route and the tank position from the surface. Probing to confirm the lid disturbs a small area, and that is far less invasive than searching for a tank with a machine.

**How accurate is septic line locating?**

Route accuracy is generally good enough to dig to confidently. Depth is an estimate that we verify by hand at the point of excavation, which is standard practice for any buried utility rather than a limitation specific to septic.

**Do I need the drainfield located too?**

If you are building, paving, fencing, or bringing equipment onto the property, yes. Compaction over a field reduces its capacity permanently, and knowing where it is costs far less than restoring one.

**My pumper could not find the lid. Can you?**

That is a common call for us. Pumping trucks are set up to service a tank, not to trace a line. We locate from the building, mark the lid, and where it makes sense we install a riser so the next visit does not repeat the search.

## Diagnosis and Access Work

- [Septic Video Inspection](https://www.denversewerandwater.com/septic-systems/septic-system-video-inspection) The camera work that produces the locate and the line condition.
- [Sewer Line Depth and Locating](https://www.denversewerandwater.com/materials/sewer-line-depth-and-locating) How depth and route are established on any buried line.
- [Septic Repair](https://www.denversewerandwater.com/septic-systems/septic-system-repair) Fixing the component the troubleshooting identified.
- [Septic Excavation](https://www.denversewerandwater.com/septic-systems/septic-system-excavation) Opening access once the position is confirmed.
- [Hydro Excavation](https://www.denversewerandwater.com/methods/hydro-excavation) Exposing buried components without striking them.
- [Property Purchase Inspection](https://www.denversewerandwater.com/properties/property-purchase-sewer-inspection) What to establish about a septic parcel before closing.
- [Septic Systems Overview](https://www.denversewerandwater.com/septic-systems/denver-co) The three stages and how each one fails.
- [Emergency Septic Repair](https://www.denversewerandwater.com/septic-systems/emergency-septic-system-repair) When the locate needs to happen today.

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Denver Sewer and Water is a privately owned, licensed and insured plumbing contractor. We are not affiliated with, endorsed by, or connected to Denver Water, the municipal water utility, or any government entity. To pay a municipal water bill or reach the public utility, visit denverwater.org.

Source: https://www.denversewerandwater.com/septic-systems/septic-system-locating-trouble-shooting