Mash tun simple question

[GeorgiaMead]

Im ordering ball valve and everything to convert my 10 gal cooler, im getting a 2.5 in instead the 1.5 to ensure clearance so i can hook my manifold up.

I was wondering what size barb should i use? 1/2 in or 3/8in?

 

[GeorgiaMead]

This is what i plan on ordering, what yall think?

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