Suit GQ TD42 With the Vaccum pump on the Alternator

This is the Genuine Nissan, Low pressure Oil Drain line From the Vaccum pump.

Only when the Vaccum pump is fitted to the Back of the Alternator. 

This does not suit the later models where the vaccum pump is mounted below the injector pump.

It is very common for this hose to perish and crack,

They can often just start leaking, Especially if the alternator has been moved.