In South Africa, sewage is dealt with in 3 ways- 1)it can sent to a septic tank where bacteria work on it and reduce the volume; 2)it can be sent to a conservancy tank where the sewage is periodically removed by a ‘honey sucker’ or 3)it is sent to a municipal sewerage reticulation system where it is eventually treated at a plant.
Many people get confused between a septic tank and a conservancy tank. When planning a building (and where municipal sewerage systems cannot be connected to); the builder must plan for either a in situ treatment system, i.e. a septic tank (or a series of septic tanks) or for a conservancy tank (or tanks) where the contents will be periodically be pumped out. It must be ascertained whether private contractors or municipalities offer a sewage removal service in the area.
Generally, a polyethylene septic tank is less costly than a conservancy tank. Although a poly septic tank usually has two internal chambers, in other respects it is less robust and with fewer connectors/outlets when compared to an equivalent polyethylene conservancy tank. A conservancy tank is generally built with more strengthening ribs and is heavier; this is to ensure that when it is completely pumped dry, the tank can still hold its shape and not collapse due to the surrounding earth applying pressure on it. These factors mean that conservancy tanks are usually slightly more expensive than equivalent capacity septic tanks.
When positioning the septic or conservancy tank, remember that a sewage removal truck will need to access the tank in case of a conservancy tank.
The advantage of a septic tank is that, correctly sized, it may last for 10 years or more without any intervention. Disadvantage is that if for any reason the household increases in number of people, the septic may be overloaded with unpleasant results.
Conservancy tanks can be regularly pumped out, preventing any chance of overloading which is an advantage. However, there must be a suitable service provider in the area and the cost of this service should also be taken into account.
It is important to size the septic or conservancy tank according to the number of people in a building. Here is a guide provided by JoJo Tanks for their polyethylene septic/conservancy tanks:
1250 litres for 2-4 people
1500 litres for 2-6 people
1750 litres for 4-6 people
2000 litres for 4-7 people
2500 litres for 4-9 people
6000 litres for 10+ people
If you are in South Africa, be sure to look into JoJo Tanks’ high quality polyethylene septic tanks and conservancy tanks (available in the sizes shown above).
Click on the links below for more information about other JoJo Tanks products, including water tanks, chemical tanks, silo tanks, underground tanks, tank stands and more.
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 TANKS. Also 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 8-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.
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