Friday, July 21st, 2017

Septic System Design

October 28, 2009 by  
Filed under Latest Septic Information

septic system designIf you are building outside a metropolitan area and have no access to any type of regulated sewer system, especially if you will be building a new home (or remodeling a house that is several decades old), chances are you will need to install a new septic system or consider a new septic system design. You should consider your septic system design options very carefully, based on several different sets of criteria.

Soil is a major factor in determining septic system design

A lot will depend on what type of soil you have on the property, as well as how much space you have in which to build your septic system. However, before you can determine these things, you need to figure out the best placement for your septic tank, so that it won’t contaminate the ground water or come in contact with the house in the event of an overflow. Another factor to consider is how many people will be living in the house and how many bathrooms there will be. Knowing these things will help you determine which septic system design is right for your new house. In addition to these things, the pipes from the tank will need to be placed at specific angles and depths to meet code, so it is best to research thoroughly or seek professional assistance before installing your septic system.

Standard gravity flow septic system design

The standard septic system design is a rectangular concrete tank, generally at least 1000 gallons, with at least one divider in the middle, an influent (incoming waste) pipe, another, perforated pipe for effluent (outgoing clarified waste), and a leach or drain field into which the effluent flows. Different types of substrate (soil, rock, sand) are layered in the drain field along with other materials, and these process the effluent so that it is no longer a threat to the ground water.

Septic system design for vertically challenged lots

If your build site has excessive amounts of sand or rock, is frequently wet, is on a steep incline, or has limited space your septic system design will need to differ significantly from the standard septic system design. The reason for this is that in most of those conditions, you will not be able to include a proper drain field in your septic system design. You will need a professionally designed secondary tank instead. This probably will feature two more chambers, as well as a motorized aspirating mixer. This will take the place of the filtering functions normally performed by the substrates of the drain field.

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