Steam School: Boiler Feeding Ohio Injector Company Garfield Dual Jet Injector

The Ohio Injector Company of Wadsworth, Ohio was formed to produce its line of Garfield Dual Jet Boiler Injectors. Dual jet or dual tube, positive overflow injectors have an advantage over automatic injectors in that they will deliver hotter water and can handle a hotter water source. Assuming the proper size is installed, and once adjusted, they can effectively feed water to the boiler at the same rate as is being evaporated.
This video outlines proper operation schematiclly and with live demonstrations.
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[@rustysteed8414]

And how did someone figure this out?

[@lineshaftrestorations7903]

Osmosis......