Drain tile types vary between homes by a few different materials that have changed over the years due to building code requirements. Your home could have concrete/clay tiles, Big "O" pipe, 4" PVC or to one's surprise, nothing at all! The longevity of each material varies with the soil condition and the settlement of debris and dirt in the pipes. It is highly recommended that you flush your drain tile every 3-5 years depending on the soil conditions to ensure proper water flow by hydro flushing. Drain tile can usually last anywhere between 10 and 25 years.
Our jetter system uses 5500 psi @ 4gpm with a 100' self propelling hose to clean the inside walls of the pipe to draw debris back to the sump where it is removed. If you do not have a sump in your yard, we would then dig test holes and access your drain tile through those holes to allow the flusher hose access.
A sump is a large circular concrete basin where the water in your perimeter drains collects and enters through 2 drain lines, settles any debris to the bottom, and then takes away the water out to the street through a solid line storm connection or to a rock pit somewhere on your property.
First when repairing a foundation crack our crew would excavate a hole on the exterior wall all the way down to the footing of the house. The next step would be using an electronic concrete chipper to chip out the crack approximately one inch deep by 2 inches wide all the way down to the foundation footing.
The next step would be applying a hydraulic cement product which would be applied to complete a smooth finish from the crack to the foundation wall. The hydraulic concrete would then expand inside the crack and then harden to prevent any water ingress. A foundation damp proofing or "tar" with a plastic membrane like Delta MS, are just a few of the options available after the crack is chipped out and repaired.