Garden Route Septic Tank Installations: Plastic Septic Tank Installation

Garden Route Septic Tank Installations installs polyethylene septic tanks for properties across Mossel Bay, George, and the towns between them. Plastic is usually the faster and more affordable option, and it suits the majority of residential installations in this area well.

Why do most residential installs use plastic?

Cost and ease of handling, mainly. A plastic tank is a fraction of the weight of an equivalent concrete one, which means it can go in on sites with tighter access, without needing a crane. That translates directly into a lower installation cost and a quicker job.

What’s the tradeoff against concrete?

Lifespan. A well-installed plastic tank typically lasts 20 to 30 years against concrete’s 40-plus, and it’s more susceptible to damage from nearby excavation or a vehicle driving over the buried area. For most households that’s an acceptable tradeoff against the lower upfront cost, but it’s worth knowing going in.

Does the water table around Mossel Bay affect whether plastic is suitable?

It can. Because plastic tanks are lighter, a high water table increases the risk of the tank shifting or floating if it isn’t properly anchored. On sites where this is a real risk, particularly close to the coast, we either anchor the tank securely or recommend concrete instead, depending on what the site assessment shows.