Is there a reason why the gas lines should be 5/16" instead of 1/4"? The reason why I ask is because I'm seeing 1/4" barbed distributors. (After looking at the prices, I think I'm going with a 4 way distributor as opposed to a 4 way regulator). 1/4" swivel nuts, hose, and distributor are all cheaper than 5/16", so I was just wondering if there's a significant reason why 5/16" is the norm for a gas line.