any advantage?

[tdunks]

Is there any advantage to having a setup like this: pump(3/4" out)-rad(3/4"in 1/2" out)-block(1/2in 1/2 out)-Pump (1/2 in) vs all 1/2" fittings?

With my rad it has 3/4 inch thread sizes and witrh my pump 3/4 inch. block is 1/2 inch.

[javascripterror]

Whats the size of the pump inlet?

[tdunks]

if u reas it says 3/4..

[javascripterror]

I will repaet again what is the size of the pump inlet. Not the thread of the inlet the pump inlet tube diameter.

[tdunks]

it has a 3/4 inch barb i have 1/2 inch barbs also..

[tdunks]

anyone?

[javascripterror]

Generally speaking a pump with a 3/4" inlet and outlet connected to 1/2" inlet and outlet on a radiator will present no problems. You would need to convert the 1/2" to 3/4" again before the pump inlet which will nullify a lot of the benefit of having a 3/4" inlet on the pump. To avoid this you could (1) fit a reservoir before the pump with its own 1/2" inlet and 3/4" outlet or (2) as you indicated in the previous post use all 1/2" through the loop. By the way what is the pump head and flowrating.

[tdunks]

the flow is 1350lph and 2.05m head

[javascripterror]

That size pump would be suitable for your cooling needs with the 3/4" inlet as you described earlier.

[Reinvented]

6 feet of head pressure? That's very little. And more-so, hardly suitable..

[tdunks]

i tried it in my system with it running submersible and me lifting the end of the loop oput of the bucket...it does give quite a bit of flow

[javascripterror]

6 feet of head pressure? That's very little. And more-so, hardly suitable..

Depends on if you need a fire hydrant to cool or a bit of finess I suppose.