A large diameter sewer pipe is an underground carriage system specifically used to convey sewages from the residence and commercial buildings for treatment or disposal. It offers the perfect solution for waste water and sewage systems. The pipes are lighter in weight with great chemical resistance.


Back then, Sewage treatment was less effective when waste is diluted with water leading to the combination of a sewer overflow when runoff from snow melt or heavy rainfall is greater than the hydraulic capacity of sewage treatment plants. To overcome these challenges, some cities civil engineers were hired to build separate sewer pipes to collect only municipal wastewater leaving behind storm water runoff collected in different storm drains. The decision between the two separate systems or the combined sewer system is basically on the need to treat sewage and cost of providing treatment during periods of heavy rain. Most cities with combined sewer systems built before treating sewage have not fully replaced those sewer systems.


In the modern world, sewers are pipes from buildings to one or even more levels of larger underground trunk mains, which help in transporting the sewage to sewage treatment facilities. Vertical pipes, which are mostly made of precast concretes known as manholes helps to connect the mains to the surface. Depending upon site use and application, these vertical pipes can either be eccentric, cylindrical or concentric. The manholes are useful in accessing the sewer pipes for maintenance and inspection, and as a way to vent sewer gasses. They also facilitate horizontal and vertical angles in otherwise straight pipelines. Large diameter sewer pipes transporting sewage from one building to a common gravity sewer line are referred to as laterals.

Branch sewers run underneath the streets to receive laterals from buildings along that street and discharge into the trunk sewers at manholes. Sizing and design of large diameter sewer pipes considers the population intended to be served over the life span of the sewer, flow peaking from the timing of daily routines and the per capita wastewater production. Large sewer diameters are mostly specified to prevent any form of blockage by solid materials being flushed down toilets.


Flood Alleviation

Developers are finding it hard to store an increasing volume of flood water in their bid to satisfy the requirements of government agencies and local authorities to obtain planning permission. Increasingly, civil engineers are being required to satisfy these daunting requirements. The large diameter sewer pipes offer flexibility in design and forms part of an engineered solution, located under highways or public open space.

Renewable Energy

The large diameter sewer can be useful in a variety of ways to assist the sustainable renewable energy. The system’s durability, strength, and versatility enable large tank structures created for both below and above ground applications.


The large diameter sewers are increasingly used as a displacement ventilation system conduit. Also, the electro-fusion welding and the Bio master anti-microbial inner lining affords awesome air quality.