Need Help IDing Some Valves And Brass Fittings

[staybusy]

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Any idea where these fittings are used, or specific ID would be appreciated!

1) is referencing the valves btw not the obscure item

[toprecycler]

My best guess

1. ?
2.?
3. Air vent. Will release air in a water line and the the water level will raise a float shutting off vent. Used in water heating systems.

4. ?

5. Temperature sending unit.

6. Valve used in refrigeration system.

7. Looks to be some sort of pressure adjustable regulator.


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[slip knot]

#4 could be a solenoid valve. With the magnetic actuator missing

[digger doug]

Looks like some stuff dug from a scrap barrel.

[staybusy]

Thanks guys. Most of the brass will probably get melted down into bars, was just curious if there was anything useful for future projects.