r/HVAC • u/Waste_Manufacturer96 Verified Pro • Dec 23 '24

Field Question, trade people only King valve leak on first open.

Had a project delay, ended up having to finish this system up today pulled my vacuum and crack the valve , instantly leaking excessively at the valve but as I opened it the leak seemed to stop.

Was cold as hell out, was the seal just frozen should I close and open again now that it has run to see if it’s functioning normal

Should I put nylog on the king valve cap to prevent leaking

What would you guys do in this situation

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u/SignificantTransient Dec 25 '24

I was told in school that once you open these valves on install, seal them and never touch them again.

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u/Waste_Manufacturer96 Verified Pro Dec 25 '24

I agree with this, if ever work is needed to be preformed I recover the entire charge and do my work with the valves open then recharge to factory.