valukanalite süsteem sulametalli suunamisega valuvormi altpoolt; süsteem tagab vormi rahuliku täitumise sulametalli turbulentsi tekitamata ja valandi tardumise ülalt alla (vrd valukanalite ülemine süsteem; valukanalite eralduspindsüsteem; valukanalite korrussüsteem), a gating system in which the metal from the pouring basin flows to the bottom of the mold cavity in the drag ensuring that the last metal (the hottest metal) into the casting will be at the bottom of the casting; the main advantage is that the turbulence of metal is kept at a minimum while mold erosion is prevented (compare: top gating; parting line gating; step gating)