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How Can I Find My Drainfield?
Locating your drainfield is not an exact science. There are very long trenches, several smaller trenches, square trenches, and oddly configured trenches. Homeowners often don’t know where their drainfield is located it’s not always obvious by looking at the yard (shown right).
Probing can be much easier in soft or sandy soil, and sometimes you can feel the gravel or pipe under the surface. But, in rocky soils, that’s often just not possible.
We suggest requesting the location records and drawing of your septic system from the county or original installer. Word of caution: drawings are not always accurate if the layout changed during the installation and an “as-built” version was not drawn. Take it with a grain of salt.
If the location is not apparent and there are no septic records, then it’s anyone’s best guess. Finding the outlet pipe to the tank may indicate the direction of the drainfield, but the pipe can turn at any point. There is no typical length or size of drainfield. Each drainfield is designed for a specific property.
Which is the distance at placed the spray heads ? i find only one, and How many spray heads are supposed to have?
Each system has spray heads placed different distances. And each system has a different number of spray heads. Have you tried calling the installer or permitting authority to see if they have a drawing of the system? That would be my suggestion. Without a drawing, its anyone’s guess.