Soakaways can work for many years but there comes a time when they can fail. This can be down to several reasons.
The sub-soil around a soak-away can seal due to grease, fat and fibres passing through the tank and this is why you should have dip pipes and a well-constructed filter system in place. Blockages can occur due to tree root ingress and impact damage to pipes. Traditional butted land drains often used in the construction of soakaways can silt up and block.
A sudden change in a property’s occupancy can overload the soakaway; a large family moving into a property previously occupied by an elderly couple can have a dramatic effect on the volume of water used. Also the ground can become saturated due to prolonged and heavy rainfall or a shift in a ground water table can also overload the system.
In most cases we can extend existing systems using modern materials, given the correct ground type and a big enough area to work in. On occasions it may be necessary to install a pump chamber on the outlet of a septic tank in order to lift the wastewater into a more suitable area or to utilise any good quality topsoil that may be covering clay based sub-soil.
On other occasions where the ground is just not suitable for a traditional soakaway, or the final product finds its way through to a water course, then the tank may need to be upgraded by installation of a treatment plant system.