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Outside Spigot Question.

 
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Old 11-21-2018, 09:13 AM   #41
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Re: Outside Spigot Question.


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Originally Posted by MarkJames View Post
I would call that ratio "feel", so it makes sense if the feel of snugness is different for different materials. But maybe it's a plumbing myth afterall.
"Snuggness" also changes by diameter of the fitting (probably more so than the material).

Biggest thing is don't over tighten, failure due to stress on the assembly can happen down the road and cause a real mess.

A myth to keep you from doing plumbing---keep having leaks and you'll stay away from plumbing.

Tom
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Old 11-21-2018, 09:19 AM   #42
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Re: Outside Spigot Question.


Check this out, per Lasco Fittings:


Here are some of the Do's and Don'ts of PVC joint assembly:

Don't over-tighten joints by giving them "one more turn to be sure."
Do finger tighten plus one or two turns - No More.
Don't wrap Teflon tape or Teflon paste or pipe dope to add bulk to or to lubricate the joint. (my highlight)
Do use a sealant for threaded joints.
Don't use "stronger" Schedule 80 threaded fittings on the assumption that they may solve the problem of splitting through over-tightening.
Do use only Schedule 40 threaded fittings with Schedule 40 pipe and fittings.
Don't over-tighten.
Do finger tighten plus one or two turns.
.....
.....
Teflon tape, Teflon paste and pipe dope is intended for metal pipe and fittings. Metal to metal fitting joints are more difficult to tighten than plastic; the surfaces tend to gall without the aid of such lubricants as Teflon or pipe dope. Plastic fittings do not need this lubrication.



http://www.lascofittings.com/threads

Last edited by MarkJames; 11-21-2018 at 09:22 AM.
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Old 11-21-2018, 09:26 AM   #43
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Re: Outside Spigot Question.


Quote:
Originally Posted by MarkJames View Post
Check this out, per Lasco Fittings:


Here are some of the Do's and Don'ts of PVC joint assembly:

Don't over-tighten joints by giving them "one more turn to be sure."
Do finger tighten plus one or two turns - No More.
Don't wrap Teflon tape or Teflon paste or pipe dope to add bulk to or to lubricate the joint. (my highlight)
Do use a sealant for threaded joints.
Don't use "stronger" Schedule 80 threaded fittings on the assumption that they may solve the problem of splitting through over-tightening.
Do use only Schedule 40 threaded fittings with Schedule 40 pipe and fittings.
Don't over-tighten.
Do finger tighten plus one or two turns.
.....
.....
Teflon tape, Teflon paste and pipe dope is intended for metal pipe and fittings. Metal to metal fitting joints are more difficult to tighten than plastic; the surfaces tend to gall without the aid of such lubricants as Teflon or pipe dope. Plastic fittings do not need this lubrication.



http://www.lascofittings.com/threads
Then explain my highlight----one contradicts the other. Can't have it both ways.

I'm not using the product to lubricate, I'm using it to seal.

PVC can gall also.

Tom
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Old 11-21-2018, 09:31 AM   #44
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Re: Outside Spigot Question.


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Originally Posted by tjbnwi View Post
Then explain my highlight----one contradicts the other. Can't have it both ways.

I'm not using the product to lubricate, I'm using it to seal.

PVC can gall also.

Tom
Yup, I saw that myself.

Last edited by MarkJames; 11-21-2018 at 09:51 AM.
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Old 11-21-2018, 09:39 AM   #45
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Re: Outside Spigot Question.


On the other hand....

Charlotte Pipe says to use only Teflon tape on threaded PVC, not any pastes since they may contain chemicals that break down the plastic.

http://www.charlottepipe.com/Documen...ures/BR-PK.pdf
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Old 11-21-2018, 09:53 AM   #46
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Re: Outside Spigot Question.


I use Teflon tape on threaded PVC all the time.

In fact, the only time I sometimes have trouble with cracking is due to binding, when I've NOT used Teflon.

I don't use dope on PVC, however. Like you said, some of the chemicals can react adversely with PVC.

Or so they say.
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Old 11-21-2018, 10:51 AM   #47
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Re: Outside Spigot Question.


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rector seal....

as it is known on site as....rectum seal...
Ohh, the memories of using rectum seal, sticky, goopy, hard to get off the hands and clothing if one's a little messy but man does it work.
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Old 11-21-2018, 07:27 PM   #48
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Re: Outside Spigot Question.


Here read this .................

https://www.linkedin.com/pulse/what-...-larry-workman

Also NPT threads with plastic and metal are always a problem. Plastic threads tend to grind, shear, or even break
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Old 11-21-2018, 07:30 PM   #49
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Re: Outside Spigot Question.


Some threads aren't NPT and are straight that will cause problems too
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Old 11-21-2018, 09:43 PM   #50
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Re: Outside Spigot Question.


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Some threads aren't NPT and are straight that will cause problems too
They would be called out as NPS. electrical fittings for EMT are NPS.

Tom
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Old 11-23-2018, 07:12 PM   #51
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Re: Outside Spigot Question.


Pipe dope I use is Bloc, blue stuff. Used it on boiler fittings and always held.
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Old 12-06-2018, 11:33 PM   #52
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Re: Outside Spigot Question.


Cleaned off everything on the one spigot...wrapped 6 wraps of tape and tightened it up. Not quite as tight as I would have liked it but tight enough it doesn't leak and at 6 o'clock.
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Old 12-07-2018, 08:44 AM   #53
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Re: Outside Spigot Question.


Good job!
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Old 12-07-2018, 09:00 AM   #54
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Re: Outside Spigot Question.


Just wondering...

I have this rule to not take on a plumbing repair or modification on Friday afternoon (certain ones, anyway). Bad karma tends to visit, especially in the older homes. Anybody else have this rule? If you have dinner plans, forget it.

Last edited by MarkJames; 12-07-2018 at 09:04 AM.
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Old 12-07-2018, 11:43 AM   #55
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Re: Outside Spigot Question.


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Good job!
No big deal. I just like to post an outcome when people take the time to reply to a question.

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