Genuine Dyson DC07 hose

When would this part need replacing?
When it is split
When the wand handle keeps slipping out of the end (lock worn)

Will fit DC07 models below:

DC07 Standard, DC07 All Floors, DC07 Allergy, DC07 Animal, DC07 CLIC, DC07 Full Gear, DC07 Full kit, DC07i grey/red, DC07 Origin, DC07 Tool kit, DC07 HEPA, DC07 Precision, DC07i

Genuine Dyson DC07 hose