I am using Fixture Units to get a size of “x” pipe. When I start looking at demand and specifically the expected GPM required when certain fixtures are running things get a bit more confusing.
Can I discount the expected GPM b/c we don’t usually run hot or cold at 100%
What psi drop is tolerable when calculating friction loss?
Is there an equivalent length chart for PEX-A?
Looking at some of these I came up with 1.5-2” copper for hot trunk which I know is ridiculous so trying to figure out what I did wrong. Could just be the HVAC contractor side of me wants really low friction in the pipes…
Can I discount the expected GPM b/c we don’t usually run hot or cold at 100%
What psi drop is tolerable when calculating friction loss?
Is there an equivalent length chart for PEX-A?
Looking at some of these I came up with 1.5-2” copper for hot trunk which I know is ridiculous so trying to figure out what I did wrong. Could just be the HVAC contractor side of me wants really low friction in the pipes…