Originally Posted by XNine
Originally Posted by Mega Man
Speak for yourself. 4x mcp35x =large tubing. But then most don't run quadfire either
Point is, that blocks and pump tops, do not have large openings on them. They are actually rather small (I believe 10mm ID). So going with large tubing and fittings does nothing more than cause restriction
and cause more space for liquid to be stored. There's no benefit to going with large tubing.
Larger ID can't possibly increase restriction over a smaller ID.
The smaller diameter of a fitting is very short increment, compared to the overall length of your tubing.
You can reduce a diameter for a short distance and flow will accelerate while in the reduced diameter region . . once it passes the reduced dia. region, it recovers its original velocity.
Suggesting that because the inside diameter of a fitting is only 10mm, that the overall restriction wouldn't be any different, whether all the rest of the tubing is 10 mm or 13mm is just not how things work.
Just exactly how much penalty you pay for having several feet of 3/8" ID tubing versus 7/16" or 1/2", all else being equal, is something for the guy with the test station and instruments to answer. . . . The higher the flow rate, the greater the penalty is going to be.
Keep in mind also, that barbs for 3/8" tubing are also smaller inside dia thru the barb part than barbs for 1/2" tubing, where the fitting can be about 10mm all the way thru.
Personally, if I was going to use 10mm acrylic up top and soft tubing below, I'd use 7/16" tubing for its flexibility over 1/2" barbs for the extra security and least restriction.