anyone know the fitting sizes that come as standard with Eheim 1250

[strokeside]

I want to start getting the pieces of my water-cooled rig in order, and need to know the fitting sizes for the inlet and outlet of the Eheim 1250 if I were to buy it from a store?

anyone know what they are?

 

[meatpipe]

Outlet is 1/2" (hose id) x 3/8" npt. Inlet is 5/8"(hose id) x 1/2" npt.

 

[strokeside]

meatpipe, I understand the measurements you gave for the hose ID, being the hose inner diameter, but what does the 3/8" npt stand for in the inlet.
I have no idea.

 

[ButcherUK]

NPT is a iron pipe fitting thread, I don't think the eheim is actually NPT as that's an American fitting and it's a German designed pump (I think Eheims are BSPP but I'm not 100% sure), but it's close enough that it doesn't matter. Note 3/8" NPT is nothing like 3/8" diameter, nearer 5/8" overall.

 

[muddocktor]

NPT stands for National Pipe Thread, which is a tapered, standardized piping thread that is implemented here in the USA. I'm not sure about Europe and the rest of the world. The Eheim 1250 definitely has 1/2" NPT threads on the outlet side of the pump because I screwed a 1/2" brass nipple into it to route the water from my 1250 to my waterblock.

EDIT: You might call this same size piping something different in the metric world but it could actually be a legacy pipe design that the designation has just been changed to metric, from the old imperial system. I know that in the oilfield drilling business that I work in, that the drill pipe and drill bit sizes are the same overseas as in the US, they just changed it over to metric nomenclature.

 

[Ridenow]

The actual designations on the German made pump are 11mm and 13mm. As was said before, they are close enough to be compatable with 3/8" and 1/2"