on my cossie i have the standard cossie 4x4 dump vavle, its all connected up ok, except for the small pipe right in the middle of the centre of the D/V, it isnt plumbed in at all, i have found a pic of a saph on autotrader and highlighted the bit i mean, is it ok to leave it as it is or should it be plumbed in, and lastly what problems would this cause if tis not plumbed in? its been like that since i bought the car lol