Onion Shape Septic Tank
All these tanks come with lid and frame and are of glass fibre construction.
The Onion shape septic tank is the most commonly used septic tank style in the UK - because of their shape they are easy to install and maintain. All these tanks come with a full instruction manual on how to install and maintain in order to prevent bad odour and deterioration of the septic tank. Most onion shape septic tanks should be installed with a concrete surround, unlike the cylindrical Tricel tanks which can be installed with a granular backfill.