Ultimate Flow Test - PVC vs. Corrugated Drainage Pipe
ฝัง
- เผยแพร่เมื่อ 23 ม.ค. 2021
- In this video I test the flow capacity of 4" PVC schedule 40 and 4" corrugated pipes.
Help Support the channel:
Patreon - / gcfd
Buy Me A Coffee - www.buymeacoffee.com/GCFD
Paypal - www.paypal.com/donate/?hosted... - แนวปฏิบัติและการใช้ชีวิต
You Sir have done a service to humanity for this. LOL....seriously...this is all I needed to see. Upgrading my entire french drain system to PVC later this year.
I’m a civil engineer, and we basically do the same thing but on a larger scale and with concrete pipe instead of pvc. 36 inch corrugated is standard. If we need more flow to drain the roadway faster, use concrete. If it needs to be faster yet, they make linings for the pipe which reduce friction
Thanks for the comment! Interesting.
As a new homeowner, I can't tell you how helpful your channel has been. Everyone I've talked to about drainage for my back yard has said something to the effect of, "It's super easy, just connect some corrugated pipe to your downspouts and point them away from your house down hill". It's, obviously, not that simple.
After watching your videos, there's no question that I'll spring for the extra expense, time, and effort that PVC requires. Your videos are an excellent proof of concept for using PVC for drainage. Awesome stuff!
Thank you! Best luck with your house!
the whole story is how corrugated fails over time with silt, and how it is very difficult to lay without having bellies in the pipe that stop water flow.
It's is some people just that stupid like listening to gateway city and there B's videos on corrugated pipes what a joke. clearly they don't know what the fuck they are talking about.
You should watch this channel. He replaces failed pvc drain systems all the time. th-cam.com/users/FRENCHDRAINMAN
This test used so little water it’s not anywhere near real world accurate.
I’ve been a new home owner for about a year now with low areas in my yard. I did go down to Lowe’s and buy the 10ft gutter extensions. I’ve been using them for 9 months and they have helped TREMENDOUSLY. I plan on doing an underground corrugated system to the culvert when Rainey season is over.
SPOILER ALERT (PVC IS SUPERIOR) NO SUPRISE! Great video as always. Respect from the UK
Thank you Steven! Keep watching - Shawn
😆
Not necessarily true. Corrugated with smooth interior walls is virtually crush-proof. PVC is not. Plus, PVC can freeze and crack.
Thank you Shawn. I appreciate the time and effort you take to make these videos. Ten thumbs up.
Thank you! They do take some time for sure!
I recently pulled out some 30 year old corrugated drain pipe from my own yard. The pipe was catching a lot of water from driveway runoff and downspouts. The pipe had not failed, and contained only a small amount of silt. I pulled the pipe just so that i could reroute it. I was surprised that is was in such good condition.
Nice! If it has a huge amount of flow it does pretty well.
I’m so thankful I found your channel. You really explain things well.
Thank you!
What an eye opener!! No more corrugated for me. Many thanks for a great video.
Thank you! I'm glad you enjoyed it - Shawn
Love your videos. I've learnt so much and can do my own french drains- now. You must enjoy your job as it really involves some great problem solving. Thank you so much.
Thank you Jo!
Thank you for all your time! really your experiments had helped me to decide what to use for my drainage project.
Thank you
Thanks for all the great info, bought my first house recently and have been working on getting the house to drain correctly
Congrats on the house purchase Nick!
Corregated would make a great gold catcher .
Same concept, right? Heavier particles will drop out and get caught in the ribs. Au
Gold would probably get flushed out during a hard rain. But in any case, were not trying to move gold. Dirt, shingle grit, and tree debris move right through corrugated pipe.
There are videos of people doing that.
I would say that the problem with this is actually highlighting a totally different issue. The problem is not that each rib is holding water in this test. It is that the corrugated pipe is set with a "belly" right where you covered it up with dirt. On one hand, the test should be done on a firm slope as to ensure the exact same conditions for both pipes. However, this test very perfectly demonstrates how easy it is to accidently install corrugated pipe with a "belly" in it that will cause it to fail and clog. With that said, it should be pointed out that PVC, along with its lower surface area (Corrugated is 4x the surface area) and friction making the pvd ideal; the rigid nature of pvc makes it inherently fool proof on installation ensuring that it cannot be installed with "belly" unless there is some severe negligence in the install. Contractors seem to blame contractors for poor installations being the bad rap cause of corrugated. This may be true but that is actually a negative component of corrugated.
Great Video!
100% agree. If you watch at 23:05 you can see that the corrugated is not sloped or pitched the same as the PVC. In fact the corrugated is pitched UP before it slopes down. I'm not convinced based on this experiment alone.
Corrugated is garbage , I seen so many videos where it's full of dirt and stop working after a year and they be sloped right . If u think corrugated is awesome use it and you'll see you'll have to redo the job often
Youre slow. @@p.doetsch6209
Yes, a significantly flawed experiment, but good effort though for sure. I enjoyed watching.
@@heather4230not a flawed experiment. This is a real world application, 99% of installs the corrugated will never have a perfect uniform slope, let alone an even average ish slope like the PVC has. If you’re the 1% great, but most of these you’ll find installed will be like this
Great video thanks for taking the time to proof the right way to do the job right on the first time or go cheap do all the digging and hard work and have the same problem in couple years
👍
Thank you for the effort that you put into making this video Shawn!
Thank you! Thanks for watching!
Thank you so much for all your videos they are really informative!!! I have learned so much from your videos!!!!
Thank you Jacob! I'm glad you enjoy them.
I have watched several of your videos and obviously you know your stuff. I am currently doing my childhood home's yard that had water problems since I was a child 40 years ago. At some point, my mom had it done and they used, you guessed it, the corrugated junk with filter. It was done poorly and that it wasn't even sloping right. I just pulled it all out and they were all packed solid with dirt. What made me even madder was that there's a dry well and the pipes didn't even go to it!
Keeping French drain pipes and eavestrough downspout pipes separate I didn't even know about and PVC basically forces you to have a correct slope.
Thanks for this valuable info.
Great demonstration.
Thank you! Thanks for watching!
Dude, you are SO smart. Subscriber for life now. The outflow from my basement sump pump, I relocated it myself, all PVC. Going forward, to handle my Spring run-off issues I'm doing it PVC. Worth it. Do it right the first time! Thank you for sharing your knowledge. The internet can be a great place!
Thank you for watching and commenting Snowy! - Shawn
Hi the pvc used in your basement is still black thank you
Over here we usually use pvc for surface water. And we use stiff currugated pipes with lining and slots for drainage.
👍
Hi from the UK Shawn! Love the videos - keep it up! Also congrats on 1k/1.5k!
Thank you! Thanks for watching, Shawn
I thought I heard your reciprocating saw screaming to be saved for the dirt pile. 😁great visual for the viewers thanks Shawn.
Haha it almost got buried!
I was thinking the same thing, although it may have been me screaming lol
THANK YOU FOR ALL YOU EXPLAINED
In Germany and many other European countries instead of schedule 40 pipes I can get KG pipe 110mm. Instead of being glued together they are connected with rubber sealed fitting sockets. They come in up to 6 meters length. KG stands for the German word "Kanalgrundrohr". KG pipes are the standard choice here for subsurface sewage or rainwater drainage. You can also get KG pipes with holes or slots. In German these are called "Sickerrohre". But for soil drainage almost everybody here uses corrugated pipes, including me so far. Inspired by you though I will try to use KG Sickerrohre for my next project.
Great video..... How anyone can argue for corrugated pipe is beyond me. Have a great day.
I think they argue for corrugated because it is so much easier to work with. I've never installed it but I know how difficult schedule 40 is to get it right.
Its cheaper by a lot
Easier to install / User friendly
And much more forgiving with low slopes
And it pushes debris out better then pvc in low flow days (Ignoring this test with the pipe installed like a roller coaster. 5:55)
Can be cleaned the same way as PVC
A lot less weight
But PVC has its advantages
Easier to maintain proper slope
Sealed connections
I think its personally easier to work with just because its in straight lines but that's just me.
Im always told by home owners corrugated is easier due to bending it everywhere and not having to make connections... Makes sense
Hell yeah pvc is a no brainer . I used a corrugated plastic tube as a convert in my driveway it was a huge mistake too it got full of dirt and other debris. I'm huge believer of using pvc for drainage. Thanks for posting this Shawn
Thanks for watching George! Keep drainaging!
I have been watching your videos for a while. I particularly like your revisit to your projects and showed us the results, Thank you so much and I learned a lot from you. This is a great demo. No question the PVC pipe is the way to go. Thanks
Thank you for watching and commenting! - Shawn
Thank you for the review. Very helpful
THIS VIDEO SHOULD HAVE WAY MORE LIKES THAN THIS, GREAT VIDEO MAN CHEERS
Thank you Rah!
Thanks. Very good experiment and demonstration.
Thank you!👍
Great video, these are exactly the two reasons (roots and debris accumulations in the ribs) I used SDR-35 instead of corrugated.
Nice. You can't go wrong with SDR35.
Best review ever! I’ve been debating between these 2 kinds. I think you just convinced me. Perhaps use both in some spots though, where I already had corrugated pipe installed by the previous owner. Will see.
Man did I need to see this. Thank you!
You're welcome! I'm glad it was helpful! - Shawn
Thank you sir for this video. 😢 I really needed this demo before I made my purchase.
Wow ! I am about to buy pipe. REAL happy to learn about the leaky , root getting pipe.
Excellent job
Thank you!
Was about to call you from the UK as I thought you were about to bury you Dewalt and not realize it. Glad to see it back onto top of the mound. Got me worried, that is a nice tool 😊
You mentioned the real reason why people favor corrugated several times, every time you said ‘easier’ 😊. Quality costs but normally you only pay once. Thank you for you great videos.
Thanks for watching Luiz!
I love the research confirmation!
Your videos have made me want to get a summer job at a drainage company like yours. It would be perfect for me.
My guys work very hard to get these jobs done. They also find the work satisfying to solve a problem for the customer.
@@GCFD Thanks for the reply. Much respect for your passion for helping folks actually solve their drainage problems.
Thank you for your help! Maurice :)
Thank you Maurice!
thanks for posting. I would just add - which product to use depends on your application. on my farm - if I want to drain a large area to ensure I have 3 to 4 feet of well drained soil - I would use corrugated since it will pick up water along the way to the outlet. ( it will also pick up water coming from the bottom to prevent water logging). If I want to transport a large quantity of fast moving water i.e. rain water collected from a down sprout from a roof - I would use solid PVC as I want this water to get far away and fast without seeping into soil next to my house or yard.
👍
If the corrugated doesn't have a smooth internal wall the water will have to fill up all those ridge spaces before it will flow fully
Exactly. All that water is holding in the corrugated which impedes the flow, is a magnet for roots, and collects debris. Great comment.
Thanks for this video! I needed to see this. I was considering a corrugated pipe to pull water away from a downspout. The run would be by the foundation where I was going to "T" or "Y" a fitting to also include my sump discharge and then out through a garden onto the lawn exiting via an emitter (Spring activated pop-up) My biggest concern is the shingle dust. Like in your video, the corrugated I pulled out was full of shingle dust. Also, after seeing your video, the last thing I want is for the t or y fitting to start leaking by the foundation... If I use PVC, Will the debris and shingle dust pile up at the base of the emitter. I realize there is a drain hole at the bottom of the emitter but is this enough? Can it be cleaned out without having to rip things apart? Appreciate any advice you can provide. Matt (from Canada)
HI Matt - The PVC will move the shingle dust as long as the pipe is falling like it should. I don't use popups because they block the flow. I like a pipe sticking out of the ground with nothing obstructing it or obstructing the debris from blowing out.
Excellent video. Thanks. In returning the corregidores pipe I just bought at HD. What about water flow rate for 2% slope. What is the flow rate for pvc vs corrugated for 3” and 4” pipe? Where can I find this info
Great information, I made up my mind about which pipe I will use. Cost is not my main issue I only want to do this job once. Thanks for the info.
I have two 45' perforated PVC downspout drains in continuous service since 1969. Replaced about 10 feet of outfall and cleaned root intrusion at inlets once. Amazing durability for thinwall pipe. They also clean themselves with proper slope.
I think the key for any system is to not hold water. No water=no roots. I think corrugated will flow adequately for most residential applications, and can self-clean adequately, too. And so long as you eliminate or mitigate/tape/seal underground joints, and ensure your trench is perfectly graded, I think it's adequate. But I do think PVC is better. No matter what anyone chooses, don't forget to place cleanouts at the heads!
Great video
Thank you William!
I really like schedule 40 black ABS. It's UV resistant, impact resistant, and doesn't stick out like a sore thumb in landscapes.
I like it too but we use white because we can easily find a full range of fittings. I also buy pipe by the 1340' pallet.
ABS is not UV resistant. You can't use it outside. Abs pipes are pretty standard but we never use them outside.
Oh question answered thank you sir my question was resolved I did not doubt you but completely resoloved
👍
Great job, well Done The pcv been around alot longer 👏 👍
👍👍
Well done! Thanks.
👍
A quick question, if using pvc pipe or any pipe, that you are looking to take water off a lane, should you drill holes so water can go in or will it go in anyways
Great experiment. What about for a French drain? I've seen more French drains using perf that's corrugated much more than I've seen PVC with the bottom weep holes. Which type would you call for if slope is at a minimum?? Thx
I would always use PVC. It is stronger, flows better, doesn't hold water.
Proof positive! Nice experiment
👍👍 thank you Andy
Shawn, this is another great video. Thank you. Have you considered doing a subterranean crush test? I bet I know which one would win!
That might be a good video. I see a lot of crushed corrugated, but I can't figure how why it got crushed. The homeowner has been there since the install and no huge trucks drove over the area, yet the pipe is flattened. What caused it?
Great video! And fantastic example. We only use rigid pipe. When customers insist on corrugated to save 3% of project cost we have to walk. It would clog, collapse, or fail soon and we would get the blame.
We tend to replace lots of systems that were corrugated!
Great comment Alan! I also see lots of failed corrugated pipe everywhere. It's cheap! but you don't want to cheap out on drainage.
On the perforated pvc Pipe do you lay down fabric first and then gravel and wrap the gravel and pipe just like you would the corrugated french drain ? I'm confused and trying to fix my yard.
Another great video Shawn. I've got a project i'd like to tackle in the near future and I was sure I was going to use fabric covered corrugated pipe. After watching about a dozen of your videos and some of the other guys on here I will definitely spend the extra $ and go PVC. Thanks for sharing your knowledge.
Thanks for watching and commenting Doug! Good luck with your project! Shawn
Curious how dual or triple walled corrugated with smooth interiors would stand up to the pvc. Any experience with these products or seen them fail? Seems they could be more cost effective and easier to install.
We use dual wall for 8" and larger culvert pipe
I just started French drain and it's going through my back yeard I live in CT where's cold freezing in winter the portion in the back yard at 10 in deep .my question is dose the pvc pipe freeze at that depth
What about the frost line and freezing/cracking PVC? Im in Rhode Island and I believe the frost line is buried at 38 inches. Which means I'd have to dig down at least 42 inches to prevent the heaving and cracking?
Thanks for the video, what type of corrugated pipe would you recommend for a downspout drain in FL where frost/freezing is not a concern? Thanks
I don't recommend any corrugated pipe over PVC pipe.
Could pvc be drilled on the top and sides leaving the bottom solid. That way it could allow water to enter the pvc along the way? On like a small personal system of my own property.
Hey Shawn, great video. I use corrugated pipe only to push other pipes and cables through, just as a extra layer of protection for the cables and other pipes. I'm huge fan of PVC pipes as well, but I was wondering if you can get double wall corrugated pipes with smooth walls inside. I usually buy and use them because it is easier to push cables through on long distances (greater 20 meters) without having the cables getting stuck every few centimeters. However using those might have the advantages of both worlds for you when using them as drainage pipes. What do you think?
Yes double wall corrugated rigid is good stuff. We use it for culvert pipe. I'm installing some 18" double wall in the morning. 👍
Hi Shawn this is a great video. Can I ask why do I see a portion of PVC that is capped with what appears to be a square nut type cap protruding out of the ground about a foot at the top portion of the drainage pipe? I assume this is some sort of way to maintain positive pressure? Thanks in advance for the answer?
I think youre looking at a pipe with a cleanout plug installed on it.
Corrugated pipe slows down the water flow which is good for drainage on steep slopes. Wherever the outflow is it may cause less erosion, and the ribs do a good job of holding the pipe into the hillside.
Excellent!
Thank you!
Thank you so much for showing us to not use corrugated pipes
Thank you Judy! I do need to do a "benefits of corrugated" video. It makes great mosquito habitat and is easy to flatten out when you're filling a dumpster with it.
Enjoyed the timelapse! Put PVC to the test, put the whole bucket of debris in PVC, see how long it takes to clear, or how much water! Great video!
Thank you! Thanks for watching and commenting!
good practical demo - quick back of the envelope calc suggests that corrugated can hold about 0.5L per metre in length before the ridges fill up at the bottom.
Thank you! I want to repeat this experiment with more slope to see if I can get that corrugated to flow.
Of course the pvc flows better but if you are going for perforated pipe it doesn’t follow for sure that the pvc pipe would take in more water from ground. Which would be another interesting test.
👍
That test is exactly what I was looking for when I found GCFD's video here. With all other variables equal, which is overall best - PVC with 3 sets of holes OR corrugated with 360 degrees of holes for a french drain system seeking to move (1) ground water coming up from high water table underneath plus (2) surface water during rain, (not for downspout water. obviously solid PVC is best for downspout water discharge).
Thank you. I do watch apple drains. But all my corrugated pipe is all clogged. 600 feet of it. It did last 10years. But I plan on scheduled 40 next with clean outside every 50 feet to ease clean out.
Thanks for sharing. I use PVC because it lasts longer and works better. Cleanouts are a great idea and cheap insurance in a long run like that. Best of luck with your upcoming project. 👍
Have you tried any test with double wall corrugated pipes? I'd assume the flow test to be very similar to the PVC as there is no place for water / debris to hide in the double wall case.
How many different flow rates did you test? And what amount of flow is typical for this drain system? If a low flow rate is typical then PVC seems to have an advantage for the reasons you suggest. But at different (faster) flow rates the corrugations probably do not matter much.
Thank you!!
👍 You're welcome!
Do you always use Sch 40 PVC for drains? Ever use the thinner stuff meant for non-pressurized purposes?
I mean the water has to fill the indents (for the black pipe) right? Was there something I missed?
Of course SMOOTH PVC will initially allow more flow than Corrugated, until all the ridges on the bottom side of the corrugated are filled up with water ...at which point they will have very similar flow rates unless.... we’re talking about laminar flow here and I don’t think we are.
What I’m concerned about is what perforated, corrugated vs PVC and how they compare in terms of flow rate for French drains.
Thanks,
Chas
👍
Pipes in french drains need to be almost flat, very little pitch or fall. Corrugated is harder to lay flat and will almost always have water resting in its ribs until it seeps back into the ground through the slots that initially fill it.
Looks like it would be easy to create a low spot with the corrugated when installing where water and debris would collect. Does the corrugated require a steeper angle to work properly?
The corrugated takes the shape of the trench so is less forgiving to trenching. Yes it requires a steeper angle due to the higher frictional resistance (think speed bumps).
Do you use schedule 40 on all your down spout drainage systems? What's your opinion of sdr 35? If I'm going to pour a concrete patio and need to run a down spout drain underneath it, what pipe do you recommend?
I wold recommend sch 40 because it has the most range of fittings available and it is strong. SDR 35 is good too but 40 is stronger.
If any one is in denial they don’t believe in a wind tunnel,, thank you the proof is in the PVC. great video.
Thank you!
There is a pipe that I've used called "S&D" or "sewer and drain" and it's probably 1/4 the thickness of scd-40. Its cheap, lightweight and has a smooth flow channel. All around great for small storm water systems.
That is schedule 30 PVC. it's much better than corrugated but is still easy to crush. Also, the fittings are not as readily available as schedule 40.
My sewer main from the house to the septic tank was installed with schedule 30. It's only about 24" deep, but the pipe collapsed under the weight of the dirt above it and had to be dug up & replaced. If you're burying it shallow, and it is unlikely to be driven on - ever, under any circumstances - then you could probably save a buck and use that, but personally, the risk of having to re-do schedule 30 someday far outweighs the relatively small cost savings over using schedule 40.
@@GCFD I always wondered why you didn't use smooth DWV pipe.
I would always use PVC simply for the fact that PVC is less prone to collapsing. One thing to mention is that once a corrugated pipe fills up enough, the water on the bottom travels slower than the water on the top, so it will eventually flow close to the same as through PVC at higher volumes of water. Corrugated pipe will always hold water. Try it again with 50 gals in each.
Never store water in the pipe because tree roots WILL intrude and ruin the pipe
Have you considered using thin wall sewer pipe sdr35. Less expensive than schedule 40. Yet it is still smooth on the inside.
Hi Roy - I have considered it but why cheap out when there is schedule 40? Plus I can get a full array of fittings in schedule 40 for any supply house.
I had to rip out a corrugated downspout system nearly completely blocked by roots. Replaced it with glued schedule 40 in a perfectly graded trench. It will not hold water. This is in Chicago, and after 5 years it's worked perfectly. Because it can't hold water, I don't worry about it freezing. The only unknown is whether thermal expansion/retraction with break the glue joints loose and allow roots in. Even if it does, I installed clean-outs at the top of each run, and rodding out PVC is way easier.
I agree. PVC is so much better all around.
Can I use abs for water drainage outside instead of transitioning to PVC. Thanks mate 👍
Hi Shawn, long time watcher, first time commenter 🙂. I gather you use schedule 40 on your jobs. Have you used thin wall PVC or SDR-35 (the green PVC) for runs? Pros/Cons? I’m west of you in Arkansas and have some drainage projects in the queue. Your channel has been a huge help!
Hey Aaron! Thanks for watching! I think sch 30 and 35 are fine to use. I think 40 is a little bit better. The main reason I use 40 is I can get a full range of fittings at any plumbing supply house and I buy pipe by the pallet from my local supply houses.
agree with corrugate vs pvc, but have you consider the advance drainage system pipe vs pvc?
great video have you look at double walled corrugated that is smooth on the inside just wondering your throughs on it
I don't like the 4" double wall because it's too flexible. It settles into the trench instead of staying straight in the trench, so it still holds water. The snap together connections leak water and the roots get right in there.
@@GCFD thank you
@@GCFD then dig a better trench, use a rotary laser and get the slope right. Tape the joints and it's water tight seal. Dual wall is the best of everything. If you are worried about joints, then you should be using belled end sch 40. Much better joints than couplings. Also buy 20 ft sections for long runs, has fewer joints.
@Brent Novak please post a comparison video to demonstrate your point! Until then, I will reject the idea of getting lasers involved to try to compensate for flexible pipe, adding tape to joints instead of waterproof glue as I don't think tape can stop roots from intruding. I do buy 20' sticks. I get them by the pallet. Belled joints are good for sure but I haven't had any problems with couplings.
@@GCFD you have obviously never worked with dual wall pipe if you think it is flexible. There is some flexibility but it does not bend. Being a southern boy you don't understand the force of the freeze and thaw cycle, it can break schedule 40 especially at glue joints. If you reject the use of lasers but rather use a 6" torpedo I don't know what to tell you.
Thanks for the video. When you have to make a repair in the PVC or add a downspout adapter (which is thin walled) do you use a frenco?
Yes we use ferncos or mission bands when needed. I carry them on the truck.
@@GCFD And then you do a downspout adapter, do you pipe directly to the rest of the drain or use a catch basin? I ask because we have a lot of tree debris in the gutters and that comes through the downspout where in I'd imagine it would clog the system.
@@mikieboyblue Like Shawn always says.
If you have water in a pipe. Leave it in a pipe. It is pointless catch the water, then put in a basin then to a pipe.
The water flow capability of smooth wall over corrugated is logical. My question is whether PVC's rigidity causes it to crack or break as soil shifts over time, whereas corrugated can flex. What is your experience with PVC after several years?
I live in NC where we don't get any freeze/thaw in the ground. So for our area PVC can't be beat. I can't speak to other areas with more severe weather though.
What about clay soil like super hard red dirt clay soil?
We use pvc as electrical underground conduit here in the midwest(plenty of freeze/thaw) that stuff moves around without any issues....
What are your opinions on what kind of pipe to use for a drain tile on a curved foundation or retaining wall? Is it better to have PVC set back from the foundation/wall, or to use a corrugated pipe + gravel + geotextile fabric? Would adding cleanouts and flushing the corrugated pipe with water every few months help the clogging situation?
And of course he didn’t answer.
ADS N-12 is the way to go
the fact that this video is even necessary is an indictment of the education system. It should be obvious to people corrugated tubing slows water velocity with each rib and has divots that will accumulate and hold water. Any drainage company that suggests corrugated pipes shouldn't be considered. Excellent content
Haha you would think so! there are others on youtube showing that corrugated is self cleaning by creating turbulence as it flows. The laws of thermodynamics are so far unbreakable, except in their case with corrugated, lol
@@GCFD lets pretend they can be broken - i still wouldnt want a pipe that can be crushed lol
@@GCFD Also, for fun, i did the math - each 1 inch rib (the area with a greater diameter within the tube) will hold about 1.35oz before there is enough fluid to spill over the subsequent wall. That said, on 40-foot tube with rubs every 1 inch, will hold approx. 324oz of water within the total length of the tube
If one of my guys installed a pipe with that large of a sag in the grade and then proceed to dump a full bucket on said pipe i would not be happy. Theres a place for corrugated pipe. Quite possibly if you want to slow down the water to prevent erosion. However you have pointed out its downfalls aswell such as its vulnerable nature.
Good point!
All those ribs in the corrugated pipe store water until they are filled with sand and sediment. I guess the bugs could also get a drink later. I think the term you are looking for is coefficient of friction. I wonder how well that black pipe would do with cold collection?
I think the corrugated would be great for gold collection. Look for the black sand.
What do you think about the triple wall HDPE stuff they sell at Home Depot for gutter downspout drainage? It's smooth and cheap. Seems pretty strong. Also why do you use sch 40 instead of thin wall sewer pipe?
I use schedue 40 because it is strong and I can get a full range of fittings for it from any supply house. Thin wall is not as strong (but still very good stuff) but it's harder to buy cases and cases of fittings.
@@GCFD triple wall is best of all worlds -smooth bore, cheap, flexes a bit , and takes thin wall fittings
The rivets in corrugated pipe actually causes turbulence which flushes debris more effectively than internally-smooth pipe, and it can have perforation all around the pipe to help with absorption in a French drain application, whereas pvc will crack if drilled with too many holes. The problem is when people confuse french drain applications with solid-pipe gutter and surface water applications. That’s why the majority of corrugated pipe fails.
I really appreciated this demonstration of how much debris and water gets trapped in corrugated. I am pretty much sold on the idea that the interior of the pipes need to be smooth. I started to wonder though if there is a pipe that has the same smooth interior and crush rating as PVC, but is less brittle and more flexible. I recently came across a video promoting Double Wall corrugated which is SMOOTH on the inside. It is much more rigid than single wall, but still has some flexibility compared to PVC. Do you have any thoughts on that? I also like the idea of TRIPLE WALL, which also has the smooth interior, but it seems cheaper and less durable to me.
It looks like the corrugated line isn't sloped properly like the PVC line is. Is corrugated able to expand a little bit when in a high water table and water in the line freezes? How about pvc?
Is this supposed to simulate a sprinkle or an actual rainfall? I know corrugated with a good flow of water is self cleaning due to the rapid type effect.