How to handle varying diameters in a system?

n00b · 05-03-2001, 01:43 AM

I've noticed that there seems to be all sorts of different diameters between rads and pumps. For instance, in a system with an Eheim 1250 pump (1/2" diameter intake and 3/4" diameter outtake) and DD Copper Rad (3/8" diameter intake/outtake) you've got 3 different diameters. How do you run tubing between these varying intakes/outtakes? Do you just hose clamp the wider tubing over the narrower pipes on the rad? Do you splice different tubing together? Wouldn't any sort of solution that moves from a larger diameter to a smaller one screw up flowrate? This is very confusing to me.

Ideally I'd like to build a system that has the same diameters for all the intakes/outtakes so I can just avoid this headache, but I can't seem to find a good pump/rad/waterblock combo.

gmat · 05-03-2001, 07:14 AM

I'm using a SELTZ 1200l/h pump with Senfu rad and DD Maze2. The Senfu rad and the maze2 both use 3/8 and the pump has 1/2 inlet AND outlet. I use adapters to bring 1/2 down to 3/8 and the whole circuit is in 3/8. (BTW it've dremel'd out those inlets on the Senfu so they *are* 3/8)

n00b · 05-03-2001, 12:39 PM

Could you elaborate on these adaptors?

warp_zero · 05-03-2001, 04:33 PM

They are a peace of plastic w/ a big barb and a little barb and a hole in the middle

jimsnyder · 05-05-2001, 09:30 PM

If you go to the local hardware store, the plumbing section usually has NPT, comptression, and hose barb fittings. Also, you can go directly to the source at http://www.parker.com/fcg/

05-03-2001, 01:43 AM	#1
n00b Cooling Neophyte Join Date: Apr 2001 Posts: 22	How to handle varying diameters in a system? I've noticed that there seems to be all sorts of different diameters between rads and pumps. For instance, in a system with an Eheim 1250 pump (1/2" diameter intake and 3/4" diameter outtake) and DD Copper Rad (3/8" diameter intake/outtake) you've got 3 different diameters. How do you run tubing between these varying intakes/outtakes? Do you just hose clamp the wider tubing over the narrower pipes on the rad? Do you splice different tubing together? Wouldn't any sort of solution that moves from a larger diameter to a smaller one screw up flowrate? This is very confusing to me. Ideally I'd like to build a system that has the same diameters for all the intakes/outtakes so I can just avoid this headache, but I can't seem to find a good pump/rad/waterblock combo.

05-03-2001, 04:33 PM	#4
warp_zero Cooling Neophyte Join Date: Apr 2001 Location: A.D. 2101 Posts: 65	They are a peace of plastic w/ a big barb and a little barb and a hole in the middle __________________ sub_light@yahoo.com long live TRAAM-II

05-03-2001, 07:14 AM	#2
gmat Thermophile Join Date: Mar 2001 Location: France Posts: 1,221	I'm using a SELTZ 1200l/h pump with Senfu rad and DD Maze2. The Senfu rad and the maze2 both use 3/8 and the pump has 1/2 inlet AND outlet. I use adapters to bring 1/2 down to 3/8 and the whole circuit is in 3/8. (BTW it've dremel'd out those inlets on the Senfu so they are 3/8)

05-03-2001, 12:39 PM	#3
n00b Cooling Neophyte Join Date: Apr 2001 Posts: 22	Could you elaborate on these adaptors?

05-05-2001, 09:30 PM	#5
jimsnyder Cooling Neophyte Join Date: Mar 2001 Location: Columbus, OH Posts: 23	If you go to the local hardware store, the plumbing section usually has NPT, comptression, and hose barb fittings. Also, you can go directly to the source at http://www.parker.com/fcg/

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