The engineering standards involving special single riser drainage systems mainly include:
1 "Special Single Riser Drainage System Design Code" CESC 79:96, which involves the upper special accessories: Mixers (i.e. Suweto), circulators, cyclones, side flowers and tube cyclones, etc. The special lower parts involved include: air runner, flute elbow and large curvature reducing elbow, etc.
2 "Technical Regulations for Rigid Polyvinyl Chloride Internal Spiral Pipe Pipe Engineering for Building Drainage" CECS 94: 2002. The special pipes involved are PVC-U internal spiral pipes. The special pipe fittings involved include: rotating water inlet pipe fittings, including tees and crosses, made of PVC-U and fiberglass reinforced polypropylene (FRPP).
3 "Technical Regulations for Construction Drainage Hollow Wall Silenced Rigid Polyvinyl Chloride Pipe Engineering Regulations" CECS 185: 2005. The special pipes involved include PVC-U hollow wall silenced spiral pipes. The pipe fittings involved include PVC-U hollow wall silencer pipe fittings and cyclones.
4 "Technical Regulations for Type AD Special Single Riser Drainage System" CECS 232: 2007. The special pipes involved include PVC-U reinforced spiral pipes and reinforced steel-plastic composite spiral pipes. The special pipe fittings involved include AD-type slender joints and AD-type small joints; AD-type bottom joints and AD-type extended bottom joints.
5 "Technical Specifications for Suweto Single Riser Drainage System" (in preparation) The special pipe fittings involved include Suweto.
6 "Technical Regulations for Special Single Riser Drainage Systems" (under revision) The special pipes involved include internal spiral pipes, hollow wall silenced spiral pipes, and reinforced spiral pipes. In addition to the special pipe fittings covered by the first five standards of this association, there are also TTC vortex noise reduction joints and CHT type joints.