Dan, Maximum, Trouble-Free, Design Flow Rates For Pex?

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There is a handy program for sizing pipes in the HDS software. Here is an example using pex with 140° water. try a demo of this program at www.hydronicpros.com. It does a lot of wonderful figuring for you.

hot rod

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Henry Patterson Karis HVAC

Dan, Maximum, Trouble-Free, Design Flow Rates For Pex?

Would anyone have the gpm for the different size Pex or are these correct?

3/8 Pex= 5/16" .3125" 1.6 gpm

1/2 Pex= 7/16" .4375" 2.3 gpm

5/8 Pex= 9/16" .5625" 3 gpm

3/4 Pex= 11/16" .6875" 3.67gpm

If my math is right please let me know and I will add this page to the Golden Rule Handbook as page 66a.

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Tim Doran

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Give me a call. I can provide you with the pressure loss charts and velosity charts for all sizes of pex.

Tim D.

Henry Patterson Karis HVAC

Tim, I don't have your # but here is my E-Mail

karishvac@juno.com Thank you. and hot rod also!