Drainless tanks (sealed septic tanks) are made of high density polyethylene (HDPE) and designed for collecting waste water. They are adapted to be covered with a layer of soil not exceeding 1.0 m. For deeper foundations, products with structurally increased strength are offered.
The range of offered capacities covers the range from 2 m3 to 60 m3. Depending on the capacity, the tanks are equipped with one or two 0.6 m inspection hatches. The standard height of the inspection collar is 0.6 m. It is also possible to purchase additional superstructures with standard heights from 0.3m to 0.8m, enabling its extension. The diameter of the inlet pipe is made with a standard DN160 pipe. On request, it is possible to make an inlet connection of any diameter. The design of the tank also allows you to make an overflow that allows you to connect another tank to increase capacity. Venting was performed with a DN110 pipe.
In a situation of constant or periodically high level of groundwater, when carrying out assembly works, the tank must be secured with a concrete band, protecting against buoyancy.