Monoblock septic tanks realized in PP (polypropylene), fully recyclable material, extruded sheets thermowelded with continuous wire and carry properly reinforced to resist the interment pressures and ensure walkability  The tricameral is composed of three compartments connected to each other, equipped with manhole inspection and periodic removal of sludge and a vent biogas. The connections of input and output are suitably dimensioned and equipped with a rubber gasket type with a double lip.