INNER SEWERAGE SYSTEM Russian patent published in 2004 - IPC

FIELD: building equipment, particularly inner sewer pipeline systems for buildings. SUBSTANCE: sewage system has plastic pipelines, shaped members having funnels on both ends of each shaped member, water drainage fittings for water withdrawal from plumbing fixtures, namely at least one siphon with outlet pipe having funnel. Pipelines are connected by funnels. Connection of pipelines with shaped members and with water drainage fittings is performed along outer pipeline surfaces. Inner funnel surfaces have cylindrical parts formed from funnel inlets and conical parts connected with cylindrical parts so that wider bases of conical parts are joined to cylindrical parts. Cylindrical part diameter of each funnel is equal to outer diameter of pipeline connected with the funnel. Conical part of each funnel is located from funnel side opposite to funnel inlet. Conical part of shaped member funnel has cone angle of 30 min - 1 deg and 30 min. Pipelines and shaped members are formed of polyvinylchloride. Cylindrical part length of shaped member funnel does not exceed half of connecting member diameter. EFFECT: simplified structure, enhanced operational reliability and usability. 3 cl, 3 dwg