ok, so here's my latest dilemna: since the plumbing specialty store is only open m-f 8 till 4 :evil: i had to send my better half over to pick up 3/4 inch barbs in place of the 1/2 inch barbs (to best fit the 5/8 inch tubing that comes with the xp3. (i have given up on finding 5/8 inch barb fittings).
so when i came home from work today she still had the 1/2 inch fittings. since she had taken the 5/8 inch rena tubing to the store, the guy working there, (who was very helpful to her, i will add), told her that it would be extremely difficult to fit that size tubing onto a 3/4 inch barb. he suggested using clamps with the 1/2 inch barbs. looking at the tubing as i type this, i can kinda see his point; it probably would work. but if i did use the 1/2 inch barbs, my concern would be that the barbs would slow down the outflow of the cannister too much. does anyone have any opinion on this? i know it's only 5/8 inch vs 1/2 inch, not much of a difference one might say, but i seem to recall an equation in physics where water flow is proportional to diameter raised to the fourth power.