WHAT is this around the WH drainage valve?


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Old 08-02-20, 12:56 PM
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WHAT is this around the WH drainage valve?


Brand new water heater, try to change the drainage valve from plastic to brass type. After removing the original plastic valve, found this black paste like material around the pipe. What is this? Grease? Thermal paste? And why are them there?
 
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Old 08-02-20, 01:25 PM
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It's a thread lubricate. Yes brass is better but is it really necessary? Again, a good couple gallons flush should clear the seat of any sediment.
 
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Old 08-02-20, 02:21 PM
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That's a hell lot of thread lubricant, and since the drainage valve is plastic, is there a need for thread lubricant?
 
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Old 08-02-20, 03:21 PM
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Sure why not. It makes for ease of threading but does nothing to seal the thread. Pipe threads seal via interference.
 
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Old 08-02-20, 09:10 PM
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Actually it does help seal the threads too.
 
 

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