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Like this one:
https://www.amazon.com/Everflow-Supplies...B016Y9V89C
How much cranking do you have to do to get it to seal?
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07-02-2020, 08:11 AM
(This post was last modified: 07-02-2020, 08:15 AM by K. L. McReynolds.)
What type of fitting are you screwing into? The threads on that will need pipe dope(I prefer that over tape) and are tapered threads, needing screwed into a tapered female fitting. Generally, tighten until the force is tight and about a quarter turn more.
The trouble with that type fitting is the copper end needs to be sweated first, meaning joining means holding that fitting and turning the other end.
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(07-02-2020, 08:11 AM)K. L McReynolds Wrote: What type of fitting are you screwing into? The threads on that will need pipe dope(I prefer that over tape) and are tapered threads, needing screwed into a tapered female fitting. Generally, tighten until the force is tight and about a quarter turn more.
The trouble with that type fitting is the copper end needs to be sweated first, meaning joining means holding that fitting and turning the other end.
+1
Like Mack said... What exactly are you doing?
If you use something like
Blue Rectorseal you won't have to crank it down very hard. Snug and maybe a 1/4 turn after that.
IMHO, everybody who does any of their own plumbing work should own a can of Rectorseal. It never completely hardens so it's easy to dissemble if needed.
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(07-02-2020, 08:11 AM)K. L McReynolds Wrote: What type of fitting are you screwing into? The threads on that will need pipe dope(I prefer that over tape) and are tapered threads, needing screwed into a tapered female fitting. Generally, tighten until the force is tight and about a quarter turn more.
+1
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That's a union, there is a center sealing interface. I think he understands the male NPT thread.
For that interface though, it would be similar to the NPT. You could always snug it more if it drips.
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The fitting has 2 sets of wrench flats for a reason. Use 2 wrenches. Common mistake is to get enough solder in the fitting that it runs down to the mating faces. It’s trash if you do. A dielectric union will have a rubber gasket between the sealing faces and is easier to seal. Ensure you aren’t breaking a ground path if you go that route. Properly aligned, allowed to completely cool, soldered carefully and tightened with 2 wrenches, the fitting you listed should give no issues.
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Yes the female threads to fixture, no problem. It’s the two mating faces of the union. As to the soldering, I will be making up the fittings with the faces up, so there shouldn’t be any drips getting in the way.
I guess the technique will be to keep tightening until there are no leaks.
Bad thing about these types fittings is there are three places where can be a failure.
I can’t use dielectrics in this situation. It’s for a UV light and the maker strongly recommends against using dielectrics. Apparently, there is enough UV, that it destroys the plastic in the fitting.
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07-02-2020, 11:22 PM
(This post was last modified: 07-02-2020, 11:25 PM by Bob10.)
(07-02-2020, 03:29 AM)EightFingers Wrote: Like this one:
https://www.amazon.com/Everflow-Supplies...B016Y9V89C
How much cranking do you have to do to get it to seal?
you can't use one of these?
depending on where you are using it might look at one of these
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(07-03-2020, 01:40 AM)EightFingers Wrote: What is it?
Those are just copper to male thread adapters, not unions. Roly