The builders bible for developing a drain system
The builders bible for developing a drain system
The system for removing pollution from utilities to a septic tank or sewer uses drainage pipes. In the case of the home sewer system, pipes are placed in between the inspection chambers. This system should be capable of self-cleaning without causing a blockage. A proper slope is required to ensure this smooth flow. UPVC tubing is often adopted in modern systems. Once laying has been carried out, it is vital to test the system fully before putting it into commission. The correct location for testing is between the inspection chambers.
Drainage pipes should be laid in trenches. The average depth for the pipes can range from 300 to 500 millimeters. Such sewer systems are enclosed in concrete when they pass below driveways, walkways or under a parking. Excavation of the channel to the desired level must be done at the time of work commencement. These must be inclined towards the sewers or effluent storage tanks. The drop or slope is generally in the ratio of 1:4 to facilitate water flow in a controlled way. The bottom of the trenches must be well compressed and jammed to give a secure base. Use pegs to set the levels in the trench bottoms.
Maintaining straight lines is essential while laying down the drainage pipes. When the pipes have to be fixed on a slope or towards the building, join the sections with sockets. An even and solid ground is required for laying the system throughout its length. The female and male sockets should be joined firmly using a strong adhesive. Ensure the manufacturers instructions are followed with the adhesive. At the joint of the pipe and inspection chamber, the pipe must be fixed properly upto the full wall thickness of the chamber. Pipes must be free of litter and internal obstructions.
Thorough inspections are carried out on the drainage pipe before it is laid in the channel. Make sure that they are not punctured at any point. All socket recesses have to be adequately formed in the foundation. In addition, their length should be kept to a minimum. Good leveling and grading must be provided at the entry and exit points in an inspection chamber. Once all the joints are finished, the whole system is then covered over with earth. Complete the connection to the sewer or septic tank. The drainage is finally completed by connecting the utilities to the tank.