What is the difference between a leach field and a drywell?
A leach field is a series of long thin pipes or plastic chambers installed in parallel lines. Each line is typically 50 long and a leach field generally has between three and six of these laterals. A drywell is a large perforated pre-cast concrete cylinder surrounded by crushed stone. Drywells are not typically installed these days due to groundwater separation requirements (they go too deep in the ground).
