calculate head

How do I calculate the head pressure in a 1/2" pex radiant system.
Did some looking on the web, but couldn't find anything conclusvive.
I would suspect that the pex would have so much head per ft. and then have to add in connections etc.

rrekih said:

How do I calculate the head pressure in a 1/2" pex radiant system.
Did some looking on the web, but couldn't find anything conclusvive.
I would suspect that the pex would have so much head per ft. and then have to add in connections etc.

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If you are talking about a radiant floor or in slab loop you could use the following:

Head Loss = r(f)^1.75

Where

r = hydraulic resistance of the piping
f = flow rate of fluid in gpm

I got this info out of my hydronic heating book but I also did a search of google and to stop myself from typing more then I have to check this link:

http://www.pmengineer.com/CDA/Archives/b8975647d7298010VgnVCM100000f932a8c0____