Pipe is often bought already socked, especially corrugated pipe for foundation and field drains. The sock is a cheap filter, but it can blind in fine silts, which is why many designers wrap the drain stone in fabric instead of relying on a socked pipe. Torn or bunched socks at couplings are a common weak point.
Heard on the job
Don't count on the sock in this silt, burrito the whole trench or it'll blind in a season.
Also heard as
- filter sock
- pipe sock
- socked pipe
Related terms
Burrito
Site slang for a trench drain of stone completely wrapped in geotextile, often around a perforated pipe.
Blinding
Sealing of a geotextile surface by a thin layer of fine particles that blocks flow across it.
Filtration
Letting water pass across a geotextile while holding back the soil particles it carries.