4 Things You Need to Know About Gravity Sewers

plumber chippendale gravity_sewer

Gravity sewers are one of the most common types of sewage systems used. One of the advantages of choosing to have a gravity sewage system is that there is no need for various pumping equipment and pumping stations to convey sewerage. This type of sewage system is heavily dependent on gravity which is why they are laid or structured with specific levity to maintain is self-pacing and self-cleaning properties. The disadvantage of this type of sewage system is that when there is not enough slope to the placement of the sewer, accumulation can occur and this will eventually lead to blockage. To correct this, the system will require heavy pumping to continue the flow maintain effective sewage transportation. Another thing that should be considered with this type of sewage is that the system should be placed as straight as possible to avoid bends and curves that will cause buildups and deposits. Here are other important things and facts you need to know about the Gravity Sewage System:

1. Sloping Sewer

Since the sewage system of this type heavily depends on the gravity exerted to the water and wastes inside the pipe, it is important that the system is placed at a certain declivity to achieve the self-pacing speed that it needs to transport wastewater and other solid rubbish. If the contractors and engineers fail to do this, the wastes that should be transported to treatment plants will have no way of getting there. This in return, will cause deposits, build up, and eventually to sewage backups.
With a certain flow velocity, the sewage system should be able to clean itself as the water rushes through. There will be no chances of buildups if the system maintains a steady pace of the water and wastes. This is one advantage that the gravity sewer has over pump-generated sewage system. It cuts all costs needed to generate the energy for other kinds of waste disposal systems.

2. Flow

The gravity sewage system does not require the use of any pumping device which is why there should be proper maintenance on the amount of wastewater and solid waste flowing through the system. The load of the pipes should be regulated so that the pipes and other fixtures do not get too stressed. As the population of an area grows, the sewage system capacity should grow with them. There is too much harm to be experienced when the capacity of your basic means of garbage disposal cannot compete with the level of trash and rubbish produced by your community on a daily basis. Complications and problems will be encountered every now and them with this situation.

3. Velocity

The velocity of the transportation of garbage depends on the slope and gravity with this type of sewer system. The slope of the positioning of the pipe is greatly beneficial in the flow of transport of wastes. The flow of the wastewater is also instrumental in cleaning away filth, grease and grime that is likely to accumulate in the walls of the sewer pipe. At least 2 fps, the flow of contents of the pipe should be able to resolve possible and accumulating problems.

4. Size of the Pipe

Some professional plumbers suggest that the size of the sewer pipe should be big enough that cleaning and maintenance tools can fit in case there is the need to use them. Certain pipe diameter should be chosen while bearing in mind that the sewer will be half full at any time of the day. There should be space allotted for cleaning materials to pass through.