no Les
the ref connectors are a pair of 3/8"NPT x 5/8" barb (in brass) with an ID of 12.83mm/0.505in.
this is something of a gap between the 1/2"CTS (5/8" OD copper pipe) which has an ID of 0.572"
- or thereabouts, depends on the schedule as it is OD based
the only difference in pressure drop between 0.468" and 0.505" was 0.01psi @ 3gpm
would suggest that going to 0.572" ID is not huge, but something rather small
I will dig through my old data for a correlation
Roscal
will try, but am a bit pressed for time (for reasons which will be known shortly)
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