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Venturis in baseboard plumbing
My baseboard plumbing is old with lots of leaking copper fittings, so I plan to gut and replace all w/ Pex. My question is: should I eliminate the venturis and go strait thru all baseboards? Second, is there a general design guide for baseboard system layout and plumbing? Why are venturis used instead of going strait thru the baseboard? Third, can I mix venturi and strait thru baseboard plumbing? thanx in advance for advice.