Septic Dye Tests

Septic System Dye Test: $200.00


Septic Dye Testing is a non-invasive procedure that is used to determine the condition of the components of a home’s waste system. A septic dye test can expose obvious leaks and inadequacies in the system and indicate the need for repairs or alterations. It involves the introduction of a fluorescent dye into the septic system, which is “traced” to ascertain that the septic system can handle the volume of waste that is currently being put through it.

A septic dye test is considered to be part of a Routine Maintenance Inspection of the septic system. The procedures are non-invasive, require no excavation,  and are generally limited to what can be viewed above the ground surface. It is intended as an observation of the parts of the typical waste-handling system – the septic tank, distribution boxes, leach field, and any related portions of the home’s plumbing and water fixtures. This type of septic inspection must be performed by a home inspector, and in most cases will satisfy any requirements set forth by lenders as related to financing.

The septic dye test uses a fluorescent dye solution to visually identify a problem with the septic system. The dye is flushed down a toilet that is (presumably) connected to the septic system being tested. The amount of dye used is determined by the size of the septic tank. Tank sizes range from 500 gallons to several thousand gallons, and of course a larger septic tank will require that more dye be used. In most cases, several ounces of concentrated dye solution is adequate for a test.

Then water is run into the system with a faucet (also presumably connected to the septic system) in order to flush the dye into the septic tank, and then into the absorption (leach) field. Again, the volume of water introduced to the system is determined by the size of the talk serving the septic system. The objective is to flood the absorption area with water containing the dye solution. A home inspector will use a formula which takes into account the size of the tank and the length of the absorption field to determine how much water to run into the system.