EK D5 X-Top Acetal Pump Top CSQ Diameter

What size are the inlet and outlet holes (diameter)? They are 1/4" are they not?

I am looking at this item - http://www.ekwb.com/shop/pumps-and-...d5-series/ek-xtop-d5-acetal-original-csq.html

This is the tech sheet - http://www.ekwb.com/shop/EK-PSS/EK-PSS-3831109842584.pdf

I am looking at this pump - http://www.frozencpu.com/products/1...ngle_Edition_13122.html?tl=g30c107s1802#blank
It clearly states on the back it is designed for 1/2 ID tubing. But, if the inlet / outlet are less than that, I can't see using 1/2 ID since the inlet and outlet will limit flow.

I have read Cathar's tube size thread, so I mean I know I can go, even as low as 1/4", but would like to use the biggest size possible given the smallest size connection in the loop. I am thinking, if I go this route, I may as well go 3/8" tubing since it will be easier to route than 1/2".

The largest hole in any G1/4 male fitting is 0.4"

So, if that is the limiting factor, the larger tubing diameter does what? Is it simply a less restrictive environment, thus increasing flow?

I mean flow has to be the reason re: Cathar's post. I guess I am not seeing why though when the fitting is smaller. I see that as what will restrict flow.

Well, that size hole is larger than 3/8" tubing is on the inside.
So you'll only get that with 1/2" tubing.

That said, I would go for 3/8".

I've use 1/2", it's a pain. 3/8" bends MUCH better.

Yeah okay. I mean 3/8 ID = .375", and if that hole is .4" the tubing is slightly smaller. But, after having read Cathar's post and after having dealt with 1/2" ID and I actually think my stuff from the hardware store is like 5/8 or 3/4" OD, like you said it was a pain. Well, I would use a stronger word haha.

Also, since we are alking about bending, I assume 3/8" ID by 1/2" OD is what to use in the LRT, as opposed to 5/8" OD?

Yeah, pain was putting it nicely