Septic tank having a lid with access port

摘要: A tank suited for use as a septic or otherwise holding treating water has top hatchway large enough to enable an adult person enter the tank. The is closed by lid which port with removable cover, where that through-passage of suction line cleaning tank, but small prevent child from entering Preferably area less than 6 percent effective and centerline lies at location between 20 80 radius lid.