On A Home Radiator nearby are Two cocks below? One cock is directly under the upper air Bleed Valve . The...

One cock is directly under the upper air Bleed Valve . The other cock is at the other end. Which Cock is the one to turn down the radiator Please. and what is the other cock for ? respectively must have its own use. Thanks for reading this examination and my gratitude if you can take the time to explain .
Will attaching a L6006 low reduce controller to...
Answers:    The bottom one shuts bad the radiator completely. I love the Yahoo censorship :)
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Strictly speaking, a radiator should have one tap with a turnable knob, and the other near just a cover. The outlet (return) spigot should be the one you can normally convert the flow by turning the knob. The other one is set so that the maximum flow is determined for the radiator. For radiators nearer the boiler, one might set the maximum to a slower flow.