poly tanks, plastic water tanks, plastic water tank, polyethylene tanks, rototank
RotoTank Soak away diagram

FRENCH DRAIN SOAKAWAY

RotoTankTM is a manufacturer of French Drain Soakaway, water tanks, chemical tanks, transport tanks, septic tanks and silos. We are a national brand with branches around the country. We sell directly to the public and deliver for free.

Rototank-Check

INSPECTION CHAMBERS

Rototank-Check

SOAK AWAYS

Rototank-Check

MANHOLES

Soak aways - French Drains / Inspection Chambers/ Manholes

Product Gallery

RotoTank™ French Drains Soak aways

RotoTank™ offer an excellent solution to increase the efficiency of your Septic Tank.

Why is a French Drain Soakaway tank used?

A soak away tank, also known as an infiltration tank, is an underground tank used to manage rainwater and wastewater runoff from buildings and septic tanks. The primary function of a soak away tank is to allow rainwater or wastewater to percolate slowly through the surrounding soil, where natural biological and chemical processes help to break down and remove pollutants before the water reaches the groundwater table.

RotoTank™ Soak away tanks are commonly used in areas where there is no access to a public sewer system, or where the available sewage infrastructure is not able to cope with the volume of wastewater generated by the local population. They are also used to manage stormwater runoff, from roofs and walkways and heavy water flow on driveways.

The size of your soak away tank depends on factors such as the soil type, the size of the catchment area, and the expected volume of water to be managed. The tank is usually used to bypass the septic tank, for bath and shower water as well as washing machines and dishwashers.

Water flows into the main body of the tank, where it builds up to the height of the perforated pipes, at this stage it starts to slowly seep down the pipes and release into your surrounding soils.

Overall, the function of a RotoTank™ Soak away tank is to provide a sustainable and cost-effective solution for managing wastewater and stormwater runoff, while minimizing the risk of environmental contamination and protecting public health.

Installing an efficient French drain/soak away system is imperative as it can prevent septic tank failures.

Septic Tank Size Volume Product Code Weight Diameter Height Lid DOWNLOAD
300l - 1 person max 300l 300SA 15kg 840mm 770mm 430mm Download
600l - 2 person max 300l 300SA 15kg 840mm 770mm 430mm Download
1000l - 4 person max 600l 600SA 25kg 1040mm 930mm 450mm Download
1750l - 7 person max 1000l 1000SA 35kg 1240mm 1100mm 450mm Download
2500l - 10 person max 1750l 1750SA 50kg 1250mm 1430mm 450mm Download
5000l - 20 person max 2500l 2500SA 100kg 1760mm 1400mm 450mm Download
6000l - 25 person max 2500l 2500SA 250kg 2120mm 1885mm 450mm Download
8000l - 35 person max 2500l 2500SA 100kg 1760mm 14000mm 450mm Download
Height Width Length
12500l - 55 person max 5000l 5000SA 225kg 1480mm 2200mm 2500mm Download

Inspection Chambers 

Inspection Chambers link up after your Septic tank but before your soak away, the reason for this is you can check the health of your septic tank as it overflows to your soak away. This should be done at least twice a year. By checking the health of your septic tank you can prevent blockages and damage. Sometimes after increased activity over holiday periods we recommend adding an activator tablet to reboot your system.

Septic Tank Size Volume Product Code Diameter Height Lid DOWNLOAD
300l - 1 person max 300l 300INS 840mm 770mm 450mm Download
600l - 2 person max 300l 300INS 840mm 770mm 450mm Download
1000l - 4 people max 300l 300INS 840mm 770mm 450mm Download
1750l - 7 people max 300l 300INS 840mm 770mm 450mm Download
2500l - 10 people max 300l 300INS 840mm 770mm 450mm Download
5000l - 20 people max 600l 600INS 1040mm 930mm 450mm Download
6000l - 25 people max 600l 600INS 1040mm 930mm 450mm Download
8000l - 35 people max 1000l 1000INS 1240mm 1100mm 450mm Download
12500l - 55 people max 1000l 1000INS 1240mm 1100mm 450mm Download

Downloads: Information & Technical Specs

Installation Diagram

Please bear the following in mind when installing your RotoTank™:      

Septic Tank Size Inspection Chamber
Field Tank Suggested Size
Soak Away Tank
Suggested Size
1 300L - 1 person max 300L 300L
2 600L - 2 people max 300L 300L
3 1000L - 4 people max 300L 600L
4 1750 - 7 people max 300L 1000L
5 2500L - 10 people max 300L 1750L
6 5000L - 20 people max 600L 2500L
7 6000L - 25 people max 600L 2500L
8 8000L - 35 people max 1000L 2500L
9 12500L - 55 people max 1000L 5000L

RotoTank™ French Drain Soak away for Septic Tanks

Septic Tanks
rototank, french drain soakaway

For larger installations we also supply Manhole junctions.

Please note: Each installation will vary, the number of pipes for your layout will be determined by the size of your property. Please consult your Plumber or Installer for the number of pipes your property will require, they are to be purchased separately from the tanks. If you have questions, please feel free to contact our Branches for more technical support. 

× Get a Quote