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Old 04-04-2019, 10:04 AM   #1
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Do these CPVC pipes have different wall thickness?


The pipe coming out of the ceiling has a blue stripe on it the other pipe has a yellow stripe on it. I disconnected them because there was a small drip at where the yellow pipe connected to the old elbow. The yellow pipe was connected more recently. Now I'm thinking maybe these have different wall thicknesses and that's why it was dripping at the elbow. Now I'm having trouble fitting the blue striped pipe into a new elbow. The new elbow fits easily onto the yellow striped pipe.
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Old 04-04-2019, 10:52 AM   #2
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Re: Do these CPVC pipes have different wall thickness?


I've never heard/known of any diameter differences between 2 different brands of 1/2" CPVC. I've seen different color markings on them but always thought that was due to being a different brand ...... but I'm a painter not a plumber so take that with a grain of salt.
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Old 04-04-2019, 10:54 AM   #3
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I've never heard/known of any diameter differences between 2 different brands of 1/2" CPVC. I've seen different color markings on them but always thought that was due to being a different brand ...... but I'm a painter not a plumber so take that with a grain of salt.
I think the blue stripe one is PVC
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Old 04-04-2019, 11:15 AM   #4
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Re: Do these CPVC pipes have different wall thickness?


The pipes may have different wall thickness, however the difference should be on the internal diameter. The outside diameter should be the same to maintain interconnection with fittings.
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Old 04-04-2019, 11:19 AM   #5
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The pipes may have different wall thickness, however the difference should be on the internal diameter. The outside diameter should be the same to maintain interconnection with fittings.
Plumbing pipes are measured by inside diameter.

The outside diameters are different. I'm asking how to join them.
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Old 04-04-2019, 11:20 AM   #6
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Re: Do these CPVC pipes have different wall thickness?


A yellow stripe means it's for flammable liquids, a blue stripe means it's okay for compressed air.
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Old 04-04-2019, 11:24 AM   #7
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A yellow stripe means it's for flammable liquids, a blue stripe means it's okay for compressed air.
Lol.

..
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Old 04-04-2019, 01:29 PM   #8
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Re: Do these CPVC pipes have different wall thickness?


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Originally Posted by farmerjohn1324 View Post
Plumbing pipes are measured by inside diameter.

The outside diameters are different. I'm asking how to join them.
Not according to the chart on this page.
Inner diameter of sched 40 and 80 are .608 or .528. Outer diamter is same for both .840.

https://www.corzan.com/en-us/piping-...ns-and-weights

Do these CPVC pipes have different wall thickness?-dimensions-pressure-rating-small.png-width-572-name-dimensions-pressure-rating-small.png
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Old 04-04-2019, 01:35 PM   #9
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Re: Do these CPVC pipes have different wall thickness?


CPVC is copper tube (CT) size. OD for all brands are the same.

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Old 04-04-2019, 01:37 PM   #10
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Quote:
Originally Posted by joed View Post
Quote:
Originally Posted by farmerjohn1324 View Post
Plumbing pipes are measured by inside diameter.

The outside diameters are different. I'm asking how to join them.
Not according to the chart on this page.
Inner diameter of sched 40 and 80 are .608 or .528. Outer diamter is same for both .840.

https://www.corzan.com/en-us/piping-...ns-and-weights

Attachment 555523
Ok.

After further inspection, it seems that they are both cpvc with 1/2" inside diameter.

I think this one may have gotten warped to a shape that is not circular enough to fit in the elbow. It did, however, fit in a Sharkbite. I'm hoping I was able to attach it with enough force that it is properly attached. There's not much of a stub coming out of this ceiling.

I'm waiting several hours for the other cpvc glue to dry before I turn it on to test.
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Old 04-04-2019, 03:30 PM   #11
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Re: Do these CPVC pipes have different wall thickness?


Quote:
I think this one may have gotten warped to a shape that is not circular enough to fit in the elbow.

that sounds plausible, I've ran into that a few times. I've always cut back to where the pipe wasn't damaged and went from there.
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Old 04-04-2019, 03:33 PM   #12
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Quote:
I think this one may have gotten warped to a shape that is not circular enough to fit in the elbow.

that sounds plausible, I've ran into that a few times. I've always cut back to where the pipe wasn't damaged and went from there.
Unfortunately there is not enough room for me to do that. I'm just hoping that SharkBite works.
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Old 04-05-2019, 10:37 AM   #13
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I could solve this problem if I had enough room to grip this pipe to put the SharkBite on. But whenever I try to push the SharkBite on, the pipe just pushes back up into the ceiling. Does anyone know a solution for this?
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Old 04-05-2019, 10:57 AM   #14
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Re: Do these CPVC pipes have different wall thickness?


Either have someone in the attic hold the pipe still or cut a bigger hole so you can access it. I'd be inclined to do the latter so I could cut out the bad section and replace.
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Old 04-05-2019, 11:09 AM   #15
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Either have someone in the attic hold the pipe still or cut a bigger hole so you can access it. I'd be inclined to do the latter so I could cut out the bad section and replace.
I cut out a larger whole so I can see more of the pipe. I couldn't get the SharkBite off with the SharkBite tool maybe because the pipe is Warped? I cut the pipe to get the SharkBite elbow off and I couldn't get a coupling on so it's perhaps warped even further up.

The SharkBite was only half on in the first place.
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