1+ Dump valve  
2+ Breather hose  
3+ Vacuum hose  
4+ Vacuum regulator  
5+ T-piece  
6+ Delay valve  
7+ Vacuum stepped hose  
8+ Double pipe clip  
9+ Vacuum control valve  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.