A plastic septic tank is a type of septic tank that is made from plastic instead of traditional materials such as concrete or fiberglass. They are commonly used in residential and commercial settings to treat and store waste water from toilets, sinks, and other plumbing fixtures. Plastic septic tanks are often preferred over traditional materials because they are lightweight, durable, and resistant to corrosion. It’s important to make sure that the plastic septic tank is made of suitable and resistant plastic material, approved by the local regulations, and to also check for the right size of tank according to the number of people living in the house and the usage of water.