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Gorton equivalents?

David_30 Member Posts: 34
Does anyone know the Gorton equivalent (i.e., 4,5,6,C or D) of the following older radiator vents:

Dole No. 1933
Dole "Syphon" vent
Ventrite #1 (adjustable) wide open
American Radiator Company No. 500

All of the above worked fine and provided a balanced system but need replacement and I'm trying to stick with Gortons.


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