FIELD: waste-water disposal systems. SUBSTANCE: invention deals with multifunctional well functioning as inspection pit of sewage net, or sewage works in the form of separator or pumping station. Well includes number of identical interjoined sections. Each section is formed by ring wall having holes varying in width on different edges which is produced from polymer material and carries stiffening ribs. Stepped surface is formed on wall and stiffening ribs are formed at least on one of its steps. Steps of section are interjoined by inclined belts forming lateral stiffening ribs. EFFECT: enhanced reliability and improved functional properties of well, increased strength and leak-tightness, simple and economical assembly of well. 14 cl, 4 dwg
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