The type of septic tank installed may depend partially on the characteristics of your home’s situation. Plastic’s lack of biodegradability means that even when in contact with decomposing sewage, the plastic tank can remain in service for a long time. Although plastic is often considered damaging to the environment because it takes forever to break down, that same aspect can be a lifesaver in this application. Plastic is the third most common modern septic tank material. However, these tanks are lighter than concrete and thus need to be anchored to prevent floating when the ground becomes saturated. Fiberglass tanks are also less likely to settle and crack. Fiberglassįiberglass material is relatively invulnerable to acid attacks, which means it can avoid any of the erosion that concrete could be susceptible to. The lid, baffles, and body of the tank can erode slowly over time, which can eventually lead to a danger of collapse. The gas can turn into an acid, which eats into the concrete. The concrete of a septic tank can have become corroded by a buildup of the hydrogen sulfide gases that sewage gives off. One is that concrete can easily crack due to settling, earthquakes, and pressure from above. However, although concrete is a relatively affordable tank material, it’s not considered the longest-lasting modern septic tank material due to two downsides. ConcreteĬoncrete is sturdy, and it’s still used for some septic tanks today. Concrete, fiberglass, and plastic are commonly used. The hydrogen sulfide gases created by the effluent in the tank, the pressures on the tank from being underground (both gravity and hydrostatic pressure), and similar forces can cause damage to tank materials. The body of a modern septic tank is typically made of a material designed to hold up well to damaging forces. Whether you last owned a septic system decades ago or whether this is your first time owning a septic system, you’ll want to learn about septic tanks before you make an offer on a rural home.Īlthough it’s only one component of the septic system, the tank is a very important component and one that requires maintenance, such as pumping from experienced plumbers in Reno. While septic tanks used to be made out of all sorts of materials (sometimes even wood), today’s tanks are typically made of proven high-performance materials.
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