Izmanto, lai pievienotu mazāko gaisa vadu pie lielāka gaisa vada, bez 
papildus izmantošanas elementiem kā trejgabali un krusteņi.
Y-Trejgabals/bikses  KTF, 60°, ar flančiem
 
    
   
     
      | KTF-100-100 | Y-Trejgabals
  KTF   100/100/100 | gab | 
 
     
      | KTF-125-125 | Y-Trejgabals
  KTF   125/125/125 | gab | 
 
     
      | KTF-140-140 | Y-Trejgabals
  KTF   140/140/140 | gab | 
 
     
      | KTF-160-160 | Y-Trejgabals
  KTF   160/160/160 | gab | 
 
     
      | KTF-180-180 | Y-Trejgabals
  KTF   180/180/180 | gab | 
 
     
      | KTF-200-200 | Y-Trejgabals
  KTF   200/200/200 | gab | 
 
     
      | KTF-224-224 | Y-Trejgabals
  KTF   224/224/224 | gab | 
 
     
      | KTF-250-250 | Y-Trejgabals
  KTF   250/250/250 | gab | 
 
     
      | KTF-280-280 | Y-Trejgabals
  KTF   280/280/280 | gab | 
 
     
      | KTF-315-315 | Y-Trejgabals
  KTF   315/315/315 | gab | 
 
     
      | KTF-355-355 | Y-Trejgabals
  KTF   355/355/355 | gab | 
 
     
      | KTF-400-400 | Y-Trejgabals
  KTF   400/400/400 | gab | 
 
     
      | KTF-450-450 | Y-Trejgabals
  KTF   450/450/450 | gab | 
 
     
      | KTF-500-500 | Y-Trejgabals
  KTF   500/500/500 | gab | 
 
     
      | KTF-560-560 | Y-Trejgabals
  KTF   560/560/560 | gab | 
 
     
      | KTF-630-630 | Y-Trejgabals
  KTF   630/630/630 | gab | 
 
     
      | KTF-710-710 | Y-Trejgabals
  KTF   710/710/710 | gab | 
 
     
      | KTF-800-800 | Y-Trejgabals
  KTF   800/800/800 | gab | 
 
     
      | KTF-900-900 | Y-Trejgabals
  KTF   900/900/900 | gab | 
 
     
      | KTF-1000-1000 | Y-Trejgabals
  KTF   1000/1000/1000 | gab | 
 
     
      | KTF-1250-1250 | Y-Trejgabals
  KTF   1250/1250/1250 | gab | 
 
   
 Apzīmējums: Y-Trejgabals КТF-Ø1-Ø2-Ø3