Six sanitary fittings
(i) Double sockets or connecting sockets
(ii) Toper pipe
(iii) Saddle junctions
(iv) Channels
(v) Knuckle bend
(vi) Drain chutes
(vii) Interceptors
(viii) Gully
(ix) Water closet
(x) Wash hand sinks
(xi) Bath
(xii) Shower
(xiii) Biggert