Because of capacity problems at both of our city's water and sewage treatment plants and the nasty properties of condensate, the discharge is required to be retained on the property. We also have expansive soils, so you need to dig a drywell, 2' by 2' by 2' and a minimum 3' from foundation, filled with 1 1/2" drain rock, covered by plastic and 6" of soil. 1 1/2" ABS or PVC to carry the discharge from an airbreak at the building to drywell.