Does any one have any real world experience on the effects of main line capacity using stainless steel couplings vs plastic couplings. A one inch mainline stainless coupling is a full 1 inch inside diameter where a 1 inch plastic coupling is 3/4 inch inside diameter. The difference does not sound like a lot but it figures out that the 1 inch stainless steel coupling has about 1.75 times the area of the plastic one. Would this mean that a 3/4 inch pipe using stainless steel couplings would have the same carrying capacity of a 1 inch pipe using plastic couplings.
I am trying to find out as I have a 2500 foot mainline to install this spring just to get to the sugar bush. A 3/4 inch line is way easier to carry. The system will be on 3/16 with no vacuum pump.

Thanks luke