[Karlmcwade]

Originally Posted by Groth

Horizontal or vertical or whatever for your pipe runs makes no difference. Running water through an obstruction (like a water block) results in a head loss (pressure drop) across the obstruction. I'm predicting based on some of BillA's pressure/flow data that with only 6 m of head to work with, you won't push more than 50 l/min through even an unrestrictive block.

More details on pump would be good. A link to it's specifications would be better. An actual P-Q curve would be best.

This pump is designed to pump water from a depth of 6 meters straight up(swimming pool) which means it has to force water up a 30mm pipe 6m high And the pumps power is 7000lmh after it has cleared the pipe so it is pumping faster than 7000lph and is loosing power so that when it gets to 6 meters it is flowing 7000lph Which is a hell of a lot Nearly 6x more than a 1250 And it is designed to move Solids ie dirt rocks up to a size of 3 cm3 (any bigger will no get threw the Grill) so i dont think that a water block will really slow it down seing the block i am making is made for Little restance for flow (hoping that the Liquid temp will be so low that i will not need a High flow restance block) I will only have 3 m of coper tubing in total (excluding the rad) and this is 28mm so 2 mm less that what the pump is rated to pump so It should in thery pump slightly faster.