Are poly septic tanks better than concrete or fibreglass septic tanks?

Plastic or polyethylene septic tanks (or ‘poly’ septic tanks) have a number advantages over traditional concrete septic tanks and fibreglass tanks.

Poly septic tanks are available in a range of sizes from manufacturers such as JoJo Tanks, making them an easy option when planning a septic tank that will service a known number of people.
plastic septic tanks
Here is a guideline as to what size septic tanks should be chosen (as recommended by JoJo Tanks):

2-4 people…install a 1250 litre septic tank

2-6 people…install a 1500 litre septic tank

4-6 people…install a 1750 litre septic tank

4-7 people…install a 2000 litre septic tank

4-9 people…install a 2500 litre septic tank

9 or more people…install a 6000 litre septic tank

These are guidelines; always opt for the next size up if in doubt of number of people occupying the building in the future.

Here are some reasons to choose plastic or poly septic tanks over concrete or fibreglass septic tanks:

  • Poly septic tanks are relatively inexpensive
  • They are easy to handle, transport and install
  • Poly septic tanks are made airtight and do not leak as readily as other types of septic tanks
  • Poly septic tanks are less prone to cracking
  • They are corrosion resistant and do not rust (there are some septic tanks made from mild steel- these are prone to rust & corrosion)
  • Poly septic tanks are properly designed by experts and thus human error is removed compared to concrete septic tanks.

In South Africa, we recommend septic tanks, water tanks, tank stands and other high quality products manufactured by JoJo Tanks; click on the links below to view the wide range of JoJo Tanks products.

JoJo Tanks South Africa offer a wide range of products such as plastic water tanks and chemical tanks to suit every household, business or agricultural need, including silo tanks and silo tank stands as well as other high quality JoJo Tanks products.  See JoJo Tanks’ VERTICAL TANKS, HORIZONTAL TANKS (transporter tanks), STEEL TANK STANDS and OTHER JOJO PRODUCTS and see JoJo Tanks’ NEW 6000 LITRE UNDERGROUND TANKSAlso see our FAQ and WATER TANK PRICES.

JoJo’s superior polyethylene plastic water tanks and steel water tank stands make JoJo Tanks the leaders in plastic water tank technology and the quality, affordability and 5-year guarantee on these water tanks make JoJo products one of the best choices in South Africa.  *All JoJo Tanks polyethylene tanks and products now carry a 8 year warranty (on tanks purchased on or after 1 July 2013)*  JoJo’s water tanks and chemical tanks come standard with a number of features that are often lacking on cheaper/inferior plastic tanks made by other companies in South Africa.

We are authorised JoJo Tanks dealers in South Africa and dispatch orders directly from JoJo Tank depots to save on transport costs. Full range of JoJo Tanks products and JoJo water tanks for sale.  CONTACT US for a quote on the right JoJo water tank or other JoJo product for you.  Special discounts are available on multiple orders of chemical tanks and water tanks and to our commercial and government customers. We can usually delivery tanks and tank stands free of charge to business/commercial addresses in South Africa.


(15000 litre and 20000 litre JoJo vertical water tanks & chemical tanks are available on order directly from JoJo Tanks’ main factory)

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