Features and benefits of the Gamma Septic Tank 4000 L 13Pe: Fully compliant, tested and approved to EN12566 Part 1 and SR66 CE marked to comply with Construction Products Regulations Simple to install for reduced on-site installation time Reduced excavation costs, saving you money Less soil disposal and less backfill material – kinder to the environment Made from MDPE – strong and durable for ultimate reliability Light, watertight and chemically resistant septic tank Robust, weather proof for guaranteed durability, giving you value for money Suitable for up to 13 people.