Installing a hydronic radiator system

Tracy

I am installing a hydronic radiator system in southern california. My plumber ran 1/2" line to 4 radiators. I have now been told that this needs to be 3/4". Does anyone have any thoughts on this? We are all new to this kind of system here, and it is a small system. I would appreciate any info or guidance we can get! Thanks

Steamhead

How many square feet EDR

are those radiators? One of my old books says 1/2-inch will supply a rad up to 90 square feet or so.

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tim smith1

pipe sizing vs # of rads

attatch a drawing and also type and physical size of rads. We can then make an educated answer.