I just moved into a new home. I have a irrigation pvc pipe that burst, I fixed it and it burst again a little further down. It gets down to the 30s where I live. And I believe I have to sprinklers that might be underground. Could that be the reason why my pipe burst?
It might be freezing if the pipes are really shallow. Where I'm at, we get down to the 20's and maybe a little lower once or twice every winter, but it's rare to see freeze damage for pipes that are buried at least 7 or 8 inches minimum. It may be poor workmanship on the install and you got unlucky to catch those breaks. Hopefully that's all that will happen. If the system is really shallow or is an issue every winter, you may need to have it blown out with compressed air.
@@Proirrigationtraining yeah they are very shallow they’re about 5” deep I believe. I fixed the second burst and it turned out to be a broken sprinkler. I found a third pvc pipe that burst behind a bush that I’ll be fixing. Hopefully that will be the last repair.
I'll see if I can find some. But to be honest, I don't think they really matter. Mostly the difference is seen over time. Glue without primer still provides an adhesive bond which is usually good enough to get a system 7 or 8 years before joints start to fail. That's my real point. PVC is designed to last 40 years, and a proper glue welded joint should never fail in that time. So if you're installing a system with only glue, you're cheating your customer out of decades of system life. I can take you to many systems that have been replaced at 15 - 20 years old because of this issue. I recently worked on a $30,000 commercial system where every single joint was pulling apart, clear glue no primer.
@@Proirrigationtraining Thank you very much for the reply. And, ok, so you're saying it's over the long term that it's an issue of being not as good as with primer. So the idea with primer is for a deeper weld being the sole difference (a deeper weld, a stronger juncture)? Although see this excerpt from the Weld-On brochure: 'If local codes permit, successful joints can be made without a primer using cement alone, but extra care must be given to the installation. It is important that a good interference fit exists between the pipe and fittings. It is for this reason we recommend that joints being made without a primer be limited to systems 2” and smaller for pressure applications (water systems only) or 6” and smaller for DWV or non-pressure applications. (Check local code requirements.)
@@Proirrigationtraining Also, see this vid which tested the burst strength pf solvent-cement alone and other bonding-welding types: th-cam.com/video/1o4E2pdEv-s/w-d-xo.html None of the joints came undone on this go-around, but the pipe burst near the joint.
@@Proirrigationtraining The Weld-On brochure: www.aetnaplastics.com/site_media/media/attachments/aetna_product_aetnaproduct/246/Weld-On%20Solvent%20Welding%20Guide.pdf
Look at this vid test: th-cam.com/video/doPXNWC1Iig/w-d-xo.html, which is about 24 hours after primer/solvent joining, at 6:50 on the vid, with 1'' sch. 40 pipe, the near end joint came undone. At 8:04 the far end joint came undone with 3/4''sch. 40 pipe. At 9:45 the 1/2'' pipe came undone at the near end. All with purple primer and pvc solvent, by a professional.
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Thank you so much. All gems and no fluff talk. Straight to the point and just the facts.
This is part of a larger comprehensive course on Pipe Systems, so most of the individual lessons get straight to it. Glad you enjoyed!
I just moved into a new home. I have a irrigation pvc pipe that burst, I fixed it and it burst again a little further down. It gets down to the 30s where I live. And I believe I have to sprinklers that might be underground. Could that be the reason why my pipe burst?
It might be freezing if the pipes are really shallow. Where I'm at, we get down to the 20's and maybe a little lower once or twice every winter, but it's rare to see freeze damage for pipes that are buried at least 7 or 8 inches minimum. It may be poor workmanship on the install and you got unlucky to catch those breaks. Hopefully that's all that will happen. If the system is really shallow or is an issue every winter, you may need to have it blown out with compressed air.
@@Proirrigationtraining yeah they are very shallow they’re about 5” deep I believe. I fixed the second burst and it turned out to be a broken sprinkler. I found a third pvc pipe that burst behind a bush that I’ll be fixing. Hopefully that will be the last repair.
thank you
Friction Loss is the deal breaker between classes of PVC!
That's right.
Use class 80 if pipe is exposed to the sun. Used mostly for risers.
Show bond strength tests with and without primer.
I'll see if I can find some. But to be honest, I don't think they really matter. Mostly the difference is seen over time. Glue without primer still provides an adhesive bond which is usually good enough to get a system 7 or 8 years before joints start to fail. That's my real point. PVC is designed to last 40 years, and a proper glue welded joint should never fail in that time. So if you're installing a system with only glue, you're cheating your customer out of decades of system life. I can take you to many systems that have been replaced at 15 - 20 years old because of this issue. I recently worked on a $30,000 commercial system where every single joint was pulling apart, clear glue no primer.
@@Proirrigationtraining Thank you very much for the reply. And, ok, so you're saying it's over the long term that it's an issue of being not as good as with primer. So the idea with primer is for a deeper weld being the sole difference (a deeper weld, a stronger juncture)? Although see this excerpt from the Weld-On brochure: 'If local codes permit, successful joints can be made without a primer using cement alone, but extra care must be given to the installation. It is important that a good interference fit exists between the pipe and fittings. It is for this reason we recommend that joints being made without a primer be limited to systems 2” and smaller for pressure applications (water systems only) or 6” and smaller for DWV or non-pressure applications. (Check local code requirements.)
@@Proirrigationtraining Also, see this vid which tested the burst strength pf solvent-cement alone and other bonding-welding types: th-cam.com/video/1o4E2pdEv-s/w-d-xo.html
None of the joints came undone on this go-around, but the pipe burst near the joint.
@@Proirrigationtraining The Weld-On brochure: www.aetnaplastics.com/site_media/media/attachments/aetna_product_aetnaproduct/246/Weld-On%20Solvent%20Welding%20Guide.pdf
Look at this vid test: th-cam.com/video/doPXNWC1Iig/w-d-xo.html, which is about 24 hours after primer/solvent joining, at 6:50 on the vid, with 1'' sch. 40 pipe, the near end joint came undone. At 8:04 the far end joint came undone with 3/4''sch. 40 pipe. At 9:45 the 1/2'' pipe came undone at the near end. All with purple primer and pvc solvent, by a professional.