JJWalecka
Senior Member
- Location
- New England
PVC coupling glued onto a stick of sch 40, Does putting PVC glue on the outside do anything at all? A waist of glue or does it actually help hold it better?
PVC cement application
- Thread starter JJWalecka
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John120/240
Senior Member
- Location
- Olathe, Kansas
I Have always swab ed glue on the inside of the fitting & the outside of the conduit.
I remember hearing that PVC connections are actually welded. The solvent in the glue softens
the two mating surfaces & they become one when you stick them together. my .02
I remember hearing that PVC connections are actually welded. The solvent in the glue softens
the two mating surfaces & they become one when you stick them together. my .02
Fulthrotl
~Autocorrect is My Worst Enema.~
- Occupation
- E
small conduit, going into a bell end on another conduit, i swab the outside of the conduit,
get it really wet, and slide it in, give it a quarter turn, and we are done....
with 1 1/2" and larger i get the inside of the coupling and end of pipe....
getting both surfaces wet allows solvent welding to be more completely done.
when i'm gluing to a coupling or MA, FA, etc. i get both sides wet. it's a stronger
weld.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I wet both parts for a good bond. I also give it a twist.
ceb58
Senior Member
- Location
- Raeford, NC
I think the OP is asking about swabbing glue on the outside after the coupling is already on the pipe. It dose a lot of good..... if you own the glue company.
kwired
Electron manager
- Location
- NE Nebraska
I think that is what is being asked also.
To the OP: The response in post #2 tells us fairly well what happens.
The PVC cement is not much of an adhesive, instead it "solvent welds" the pieces together. It kind of liquefies portions of the two parts and then they harden as one.
I'm sure the glue company be very happy with that...:lol:
GerryB
Senior Member
- Location
- woodbridge, ct. USA
Glue on the outside looks good for the inspector. Since we are talking glue what is the difference in them. The supply house gives me clear, I know there is one for cold weather, when the HO gets it it's always grey goop, and of course the plumbers are into pink. Are all these glues from different horses?:?
readydave8
re member
- Location
- Clarkesville, Georgia
- Occupation
- electrician
And as everyone reading this knows, pvc glue won't stick metal to metal
except the cap on the can
except the cap on the can
K8MHZ
Senior Member
- Occupation
- Electrician
Glue on the outside looks good for the inspector. Since we are talking glue what is the difference in them. The supply house gives me clear, I know there is one for cold weather, when the HO gets it it's always grey goop, and of course the plumbers are into pink. Are all these glues from different horses?:?
Where does it say glue on the label?
The stuff I use is cement. Not glue. I am pretty sure you are using cement as well.
Take some time to read some labels.
The PVC cement plumbers use requires primer. The PVC cement listed for use with electrical conduit is used without primer. The clear stuff is kind of thin. The grey is heavier bodied. I like the grey stuff better.
As mentioned, cement works by dissolving the PVC and when the solvent in the cement evaporates, the PVC becomes welded together.
I was taught to only put cement on the 'male' part of the joint, lest cement on the female side gets pushed ahead of the joint and drips down into the pipe, possibly making the pull more difficult.
Putting cement on the outside of a finished joint does nothing if the joint is made up properly. It probably looks like hack work to any inspector worth his salt.
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K8MHZ
Senior Member
- Occupation
- Electrician
:thumbsup: .
ceb58
Senior Member
- Location
- Raeford, NC
And if you man up it will stop bleeding from a cut.
K8MHZ
Senior Member
- Occupation
- Electrician
And if you man up it will stop bleeding from a cut.
And make you sound like Steven Tyler for a few seconds as the acetone dissolves the tissue protecting your nerve endings prior to burning them off.
Fulthrotl
~Autocorrect is My Worst Enema.~
- Occupation
- E
i always thought he sounded like that from breathing the fumes....
so *thats* how he does it......
- Location
- Massachusetts
I am with the majority here
It is cement, not glue, applying it after assembly is a waste
It will find wounds you did not even know you had.
Tyler sounds like he does becuse he is just that good, with or without PVC cement.
It is cement, not glue, applying it after assembly is a waste
It will find wounds you did not even know you had.
Tyler sounds like he does becuse he is just that good, with or without PVC cement.
JJWalecka
Senior Member
- Location
- New England
Yeah. That's what I was getting at
Tried out a spray can of the combination primer / glue recently. Worked really well. It's especially handy when working in a ditch. After you spray it on, you can just drop the can while you put the joint together. Avoids the annoying spills of the brush-in-can types that you can get when you rush and set the can on an uneven surface.
masterinbama
Senior Member
- Location
- Huntsville Alabama
I buy the gray cement the process pipers use for sch. 80 chemical piping in water plants. It seems to fuse the pipe and fittings together better than the clear, even when cold.
It does actually help hold it better... but only by a trivial amount and thus deemed, as mentioned, a waste of glue (and time).
As for what it is, it is a glue, cement, solvent, and an adhesive by generic definitions. Marketing-wise, it is called a solvent cement. It does not totally rely on a solvent "weld" to join... but a fully "welded" joint yields the best achievable binding, the reasoning behind the twist upon assembly.
As for what it is, it is a glue, cement, solvent, and an adhesive by generic definitions. Marketing-wise, it is called a solvent cement. It does not totally rely on a solvent "weld" to join... but a fully "welded" joint yields the best achievable binding, the reasoning behind the twist upon assembly.
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