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Flexible PVC vs. Rigid PVC For Pools
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- Опубликовано: 7 авг 2024
- From www.swimmingpoolsteve.com/pag... - The use of flexible PVC versus rigid PVC in swimming pool plumbing systems is a subject that causes a great deal of heated debates (name calling) within the swimming pool industry. Some swimming pool builders state that you should "never" use flexible PVC. In some areas (cold climate areas) up to 95% of the pools built are done so with flexible PVC as opposed to rigid PVC. Clearly, there is a contradiction here as both things cannot be true. What it really comes down to is that building pools is a dynamic subject. Rarely will there be a black-and-white, right-and-wrong way to approach a technical issue. Rigid PVC versus flexible PVC is definitely one of these where you can make arguments on both sides.
Rigid PVC is the superior plumbing product, however, its relative weakness to shatter resistance and cold weather makes it difficult to use. Flex PVC is more user-friendly, easier to use and less prone to shatter but it is prone to crush, kink and chemical damage from exposure to concentrated chlorine.
#SwimmingPoolSteve #poolplumbing #PVC
This is exactly the info I needed, DIY'ing a fiberglass pool in ontario right now. Dealer provided flex but I've seen the same opinions you mentioned on it here on RUclips so I've been second guessing myself. Doing a manufactured stone deck surface so any issues hopefully won't be thousands of dollars to fix down the road. Thanks!
Perfect, thank you, your whole series has been a blessing.
Living in Northern Illinois I used flex pvc for my above ground pool. The only reason I used it was for convenience and I also take it apart in winter and bring all the equipment inside. Works for my needs. Prefer sch40 pvc but oh well.
Thank you Steve
I use 2" flex pipe on my Intex pool for connections to the walls ( I threw away the Intex fittings and cut in real skimmers, returns, etc.). The intex walls move a lot, and the give in the flex pipe keeps it from destroying itself.
Finally - a good discussion on this topic. Thanks
I assumed people only used it above ground. My pool came with the house and the builder used it on tight angles from the filter to heater. I got rid of it and went all rigid. I usually go with 45's to get into tight areas. I never heard of it used underground. But I guess it would make sense.
The best thing you can use in the ground is a thick walled polyethylene pipe such as Goodall "Greenflex". It's not easy to work with, it isn't cheap either but I have seen it last 60+ years. Not just termites but grubs also can make swiss cheese out of flex pipe. Also, if you leave water inside flex pipe it can shatter just like rigid pipe, it's only flexible when it's warm and once it ages it becomes far less flexible. Lastly, if pH is ever low flex pipe can expand in the ground and when it has no place to go gets kinked, I've seen many suction pipes that pressure tested fine not work because this happened (usually under the skimmer from tablets) I once actually took several pieces of pipe and put them in my freezer just to see what'd happen with the ends capped, believe it or not the black polyethylene was the only sample that survived.
would a 6 inch flex hose be long enough to heat up get a coupler in between 2 hard pipes that have no flex?? I currently have a rubber boot like your showing with clamps in between two hard pipes. Not sure if it will hold it's on a hot tub plumbing under high pressure
Great points! I was going to use some flex but you bring up some great points.
Thanks Steve, this is exactly the info I was looking for. I'm installing my own in-ground this summer in PEI and after lots of research, I have decided to go with 2" TigerFlex buried below the frost line. I'm considering running all of the lines inside of 4" perforated black drainage pipe for extra crush protection. Would love your opinion on this?
I live in the north region with 4-5 months of deep freezing winter.. even for above bround pool i prefer rigid pvc. First flex don't last long, after few years they cracks.. they sort of corrode and the uv kills it. The steel rings if too tight will also damage the flex overtime.. hard pvc only need glue.. and for above ground pool, you can just put screw on end fittings and remove your hard pipe sections at the end of the season… you can also leave it like that but as long you empty the pipes before winter…. Another reason i hate flex is thy they move, water running through make the flex shake and tangle, especially if the water flow is changing often, each time it moves, it put stress on the ring and any silicone nearby.. the silicone will then crack.. especially on the filter head or near the pump. Hard plumbing won't put stress on anything unless someone step on the pipe or something stupid. Hard pipe have few downside however. ..you are using glue.. if you don't put enough glue it may fail.. and be ready for a huge flood.. once glue is applied or the pipe is cute and glued,, you can't change it. If you change your equipment.. you will have to redo alot of cutting and gluing . You also need a piping plan…so you jnow what to buy…and you don't start the job and realize that opps im missing 90 degree
Am I missing something? The flex PVC that I'm using is smooth inside and out, follows the same ID/OD size standards as rigid (so that regular fittings work perfectly), I can run large smooth radiuses without fittings, and it handles freeze expansion for 5500ft elevation wonderfully. I do have to soften the trench with sand to prevent rock friction wearing a hole, and I have to be a little more aware of psi, but overall, it is a win. In fact, I'm not sure how it is "budget" in Canada, because it is twice the cost in high deserts of New Mexico. I live on a lava rock shelf so digging 18"-24" down is nearly impossible without serious excavation costs. I can only get about 12" max depth, so to protect against freezing is why I originally considered flex. The ease of labor to lay the pipe/hose was heaven. I do transition it to rigid above ground because I read that the flex is less UV tolerant, but then I have to wrap the rigid in insulation for freeze weather. Let me know if I'm missing something, because I'd rather start saving now for a piping overhaul than find out mid-season unprepared... Love your channel btw.
Use it for 20 years but on 3000 gallon pond winters in Long Island NY worked find . Pipe frozen and cracked
My fox vinyl liner pool is 26 years old and plumbed with spaFlex 1.5". Still going strong today. But if I could have my way I would do the whole pool in SDR 11 or even SDR 9 HDPE smooth wall with electro fusion fittings.
The nice thing about flex is I can create a long radius bend instead of a 90 PVC fitting. Would be interesting to know if a long radius flex pipe is less restrictive than a 90 PVC fitting, despite the flex pipe being less smooth inside.
We always just heated sch 40 and bent it to get a sweep 90
The ribbed inside creates more restriction than rigid pipe. Use sweeps or heat and bend the PVC.
I’ve never heard it to be a termite issue. Thanks for the info. Keep up the good work.
I hear it is the main problem with flex pipe in some southern USA areas.
@@Swimmingpoolsteve I have heard this too. I only use flex under ground. Skimmer repair I generally go down past frost with pvc then flex. Back fill with sand. Hope customer pays 😁
It happens here all the time, usually white grubs though not termites but people often suspect it's termites. I've dug it up and seen them munching on it, I believe the water attracts them.
@@BobsPoolService where are you located? We've been using flex, but I'm thinking about going with rigid. Is this something that's common or is it rare?
@@matt22blaster We're in central New Jersey. As for how common this is, it depends a lot on the soil and also burial depth of the pipe. If they're new pipes down 20" or even deeper quite rare but if it's a replacement pipe and it runs through some loamy soil or a lawn where grubs are present it's quite common. If you can run rigid pipe easily I'd say do so, my favorite is a heavy walled black polyethylene, that stuff can last for 50 years possibly even more but it is harder to work with.
My entire house is done with Flex pipe. The line from my water meter to my house is Flex pipe. I know my info has nothing to do with pools but yeah... Anyway right now the temp is -20 and it's snowing. My pipes are frozen as of now. I have no leaks anywhere that I'm seeing. But when I had regular PVC piping in house I had to constantly replace whole entire sections of it and that was even having heat tape on the PVC. But in my experience the heat tape honestly does nothing special except make your electric bill cost a little more. But my house has been done in flex pipe for almost five years now and I've never had to replace any piece of it. And it has froze every year
I see lot of pools in Ontario, Canada from the pictures I see on the net using 1 1/2 flexible PVC from filter to pump (rest all rigid PVC). Is the Any reason/benefit of using flex pvc between pump and filter?
Have the same clear flex pipe for over 35 years and there’s no deterioration in Quebec. Pool pump and filter are enclosed and not exposed to sun so that probably makes a huge difference.
Ah, the ultimate question. 😊 I really wonder how detrimental it is to bury Schedule 40 PVC (rigid) in Southwestern Ontario where frost depth is approximately 4 ft but that's a harsh Winter. If you bury rigid 2-in PVC, 4-ft deep, will you truly have “shatter” issues?
Pipe buried 4 ft under a 2-in concrete patio will practically never see frost in a 4-ft frost-depth climate; frost-depth ratings are for soil. Might want to cover the lengths of rigid PVC that are only under soil with rigid XPS insulation in Winter-but, again, is that really necessary?
Rigid pipe won't shatter if there is no water in it. Flex hose will crush under vacuum. The only reason to use flex hose is if you're cheap. Be cheap now, spend more later.
Flex PVC Shrinks in length and diameter over time. In portable spas it ends up snapping the jets off or shrinking and pulling out of fittings. I am in a moderate climate and would never use it.
What about at Pump and equipment.
100% you should be using rigid for any equipment pad work. This is just one of the many, many points I make about how to install pool equipment in this long form tutorial in case you are interested ruclips.net/video/rxWCW3id0w8/видео.htmlsi=LouQnNOvB27QnPNf
On Westburton Power station England the French tested the boiler pipe work Sch 80. 2°chrome steel pipe in the winter with no antifreeze as it is unheard of in England burts the pipes like plastic unbelievable it was cost a fortune because we had to gas axe the casing the pipe the lot remake it all again.haha they are building Atomic Power Stations here as we speak proper clowns to work for,it only went down to -18 to -22 app it was cold. Nice video
I just installed an Inground 18x36 in norther alberta and they sent me flex pipe with the package, I went with all sched 40 pvc.....couldn't bring myself to burying flex hose under my concrete...
How deep did you bury the pipes?
I'm also very curious how deep you buried your rigid Sch-40 PVC and whether you concreted all along & overtop every run?
I'm not convinced that rigid Sch-40 PVC is a problem in Southwestern Ontario; there are many northern US installers that use rigid.