|Offset height||This is the height from the base of the cell to the height at which the drain discharges. In some designs this may be the height of the perforated [[pipe]] within the storage layer. In other designs this height is adjusted by creating an upturn in the discharge pipe. | |Offset height||This is the height from the base of the cell to the height at which the drain discharges. In some designs this may be the height of the perforated [[pipe]] within the storage layer. In other designs this height is adjusted by creating an upturn in the discharge pipe. |