Economy

• The construction period is shortened and cost saved due to narrow and low excavation.
• Vacuum valve operates without power supply and maintenance costs are low.

Eco-friendly

• Pollution groundwater and land is prevented due to improved water tightness.
• Leakage of odor from manholes and vacuum line prevented.
• No need to clean the pipe due to fast flow

• A wide and flat area where the depth between the ground and the site where the pipe is located is deep
• A soft ground area where the pipe is likely to ve sunk
• A bedrock area where the building construction is hardly made
• An area where lost of object are laid underground
• An area where it is hard to maintain the minimum flow rate and the dredging operation is frequently made
• An area where the wastewater source is located lower than theroad