Advice on Berlingo coolant header tank outlets please?

[tmmv1]

My header tank has a leak so i went and bought another from ebay the problem is the one i have been sent has an outlet missing on the top Sad
So i was wondering if all 3 outlets are needed? The 1st pic is my original tank and the 2nd photo is the one i just bough
1st one


2nd

[Stickyfinger]

Fit them yourself using copper fittings ?

I would of thought they were quite common however.......a pain to send back ?

[Bick]

Yours is off a 1.9 the bottom one is off a 1.6hdi at a guess?

[tmmv1]

Is the missing one important as it seems to just be an overflow pipe back into the top of radiator?

[Stickyfinger]

Pressure equaliser pipe ?

[tmmv1]

Not sure what its for to be honest