The old brick ones work MUCH better than the modern 'onion' shaped plastic or GRP ones. In our opinion, the best plastic ones are based on the old traditional 2 chamber designs - which are also the ones favoured by the rest of the world - apart from the UK. Visit
http://www.wte-ltd.co...dor_two_chamber.html.
You can build your own septic tank, fully conforming to BS 6297 1983, easily, and they are still OK with Building Regs.
Contact us for free plans. Media URL: http://www.wte-ltd.co.uk/septic_tank_products_information.html
Description: Build your own Septic Tank