What type of construction is required for the line from the house to the septic tank?

The construction of the line from the house to the septic tank must be watertight to ensure that sewage or wastewater does not leak into the surrounding soil or groundwater. A watertight system helps prevent contamination of the environment and protects public health by ensuring that sewage remains contained within the piping until it reaches the septic tank for treatment.

The materials used for this line must be designed to withstand the conditions beneath the surface, including soil movement and water pressure, while also preventing leaks. Watertight construction helps maintain the integrity of the system, reducing the risk of failures that could lead to system failure and environmental damage.

Other types of construction, such as flexible or water-resistant, do not adequately address the critical need for preventing leaks. Conventional construction may not always create a secure seal against leaks unless specified to be watertight. Therefore, ensuring the line is watertight is essential for the safe and effective operation of an on-site sewage facility.