Basic Principles in the Design of Sewer Systems

A sanitary sewer or foul sewer is an underground pipe or tunnel system for transporting sewage from houses and commercial buildings (but not stormwater) to treatment facilities or disposal. Sanitary sewers are part of an overall system called a sewage system or sewerage. Link for full presentation

Sewage may be treated to control water pollution before discharge to surface waters. Sanitary sewers serving industrial areas also carry industrial wastewater.

Separate sanitary sewer systems are designed to transport sewage alone. In municipalities served by sanitary sewers, separate storm drains may convey surface runoff directly to surface waters. Sanitary sewers are distinguished from combined sewers, which combine sewage with stormwater runoff in one pipe. Sanitary sewer systems are beneficial because they avoid combined sewer overflows.

 A presentation made to the Nigerian Institution of Mechanical Engineers Abuja Chapter on 25th May 2020. Download here

Design of Water Reticulation Systems

The steps in design of any water system include

  1. get a map of the are
  2. get a cordinate or topo map of the area
  3. get the land use arrangement or layout
  4. determine the density of population of the area using any available method
  5. get the RoW or road layout of the area
  6. determine the total water deman or expected flow
  7. design the distribution network
  8. determine the pipe sizes
  9. determine the tank sizes
  10. detail your drawing
  11. submit your drawing for review and analysis

About Wasser and Bau

The company was establish and managed by highly experienced team of engineers, with international experience in construction and consulting   industry in 2007 and registered with the Corporate Affairs commission in 2010. The company specializes in engineering services, water resources consulting and environmental management services such as erosion control solid waste management, sewage disposal, waste water and water treatment.

We are committed to maintaining a local presence to better serve our customers, and currently support a network of more than 3 offices in Nigeria.

Today the company is organized in three divisions; Construction Division, Consulting, and Water Resources Division. Each division is headed by a Project Manager with each division having its own marketing and technical staff, customer service staff, engineering staff, and manufacturing plant. Support departments such as Administration, Finance, Purchasing, Transport, Information Technology, Quality Assurance and Facilities Engineering are shared by the three divisions. The division heads and the managers of the support departments report directly to the Managing Director.


With headquarters in Abuja and branches in other parts of the country, the company provides superior consulting services for managing water and waste water management in Nigeria. We bring a fresh and innovative approach to environmental and water management.

 Our goal is to exceed the expectations of every client by offering outstanding customer service, increased flexibility, and greater value, thus optimizing system functionality and improving operation efficiency.  Our associates are distinguished by their functional and technical expertise combined with their hands-on experience, thereby ensuring that our clients receive the most effective and professional service in water resources management

In order to meet the individual needs of clients, we maintain a wide range of qualifications. Moreover, our functional and technical experience extends to interfacing with third-party conveyers and various unit sorters. 

 We are continually expanding upon our knowledge and services to assist clients with successfully maintaining the environment and water consulting.

Exceptional functional and technical expertise coupled with extensive industry knowledge makes our company the ideal choice for water resources management