PVC (Or ABS) Exhaust Tees and Piping

[RoyalFlush@PCB]

How many people here use PVC or ABS piping in their exhaust sytems?

How has it held up?

Looking for feedback that includes successful use, failures, or other valuable input.

Personally, I prefer a metal tubing or pipe for most exhaust and cooling lines...especially in areas only accessible via sawz-all. :bigeyes:

 

[FLY6584]

I was running pvc reinforced hot water hose on my ski with a pvc tee and I had a clog at the T which caused the hoses to melt and pop off.:banghead:

That hose was rated to 150F. I replaced it with some thicker PVC reinforced hot water hose rated to 200F and it has held up great so far. I havent ridden that much with it yet though.

I think you're ok until you have a clog in the system then you're pretty much screwed.

 

[RoyalFlush@PCB]

I think you're ok until you have a clog in the system then you're pretty much screwed.

How "screwed" are you if your PVC is not accessible?!? :dunno:

 

[FLY6584]

How "screwed" are you if your PVC is not accessible?!? :dunno:

You're even more screwed, but in the case of the waterdawg hull why would the hoses from the pump to the bulkhead melt. Those dont even get hot. Even if there was a clog I still dont see those hoses getting hot enough to melt.

But you're right. If you're building such a great hull like that why would you cheap out on hose.

 

[SJet]

Tygon hose is excellent, but $.

 

[yamahammer]

i used 2"id sched 40 pvc to bypass my waterbox on my b1 with 760 and mod chamber for kicks one day- it was right off of the pipe (way too loud) so it was pretty hot- upon disassembly (stator came loose totaled itself and flywheel same day as pvc was installed....dammit) pvc was severely melted and losing its shape after one ride. probably got rode about 5 hours that day. i would not use it again at all. maybe farther down the exhaust line it is cooler, but i dont want to be the one to findout after planning my day to go ride and the $5 i saved using pvc bit my in the azz. just my personal experience. :cool2:

 

[Speedfreak]

I have had a PVC "T" at the outlet of my waterbox for 3 or 4 years now with no problems at all.. I ren my last dry pipe with hardly no water going through the stinger for a while to see if I could tell a diference because of how dry the waterbox was. It still held up fine.

 

[snowxr]

I have PVC from the bulkhead back in my stand up. No problems at all.

 

[SuperJETT]

I ran a pvc tee after the box for a couple of years and it eventually melted. All it takes is one mess up and it's toast.

If you never have a cooling problem, you're fine, it's just the what if.

 

[goodq]

I have PVC from the bulkhead back in my stand up. No problems at all.

I don't thing it gets hot enough in that area, freestylegeek is doing that as well. Lets see how it turns out for him :cat37:

 

[Big Kahuna]

I believe the whole point is "What If"........... You would have to rip out the footholds, foam, cut out a side of the bulkhead etc to replace that setup in the WDK hull if you did have to replace it, it is not a straight pipe but curved. If it was straight you might could get buy just knocking it back out the rear and replacing, but it is not. Also, on the incoming waterlines, when you foam the ski it could be possible for the foam to collapse the lines restricting water from coming in. I would prefer to see a solid line like the OEM's use. If you are going to do it, why not do it right?


But my answer, No, I would not run PVC or ABS (as for using it for a "T", only in a pinch would I)

 

[superramjet]

i'm running it now. no problem, no waterbox. 240lb compression 951 motor nasty race fuel exhaust. And I've had some serious cooling problems with it before

maybe you guys are right, I should stop riding my ski. This is a incredible complication, I'll call Jeff right away and tell him he should cease production until further testing can be done on this.

If you feel it's necessary, Jeff will put a metal on in if you ask him.

anyway it's not pvc, its some other composite, but im not a piping expert and I cant remember what it was. I'll ask jeff and post later

 

[Big Kahuna]

Tom, dont think anybody saying it wont work, just voicing their opinions.

We know how you baby your ski's!!! LOL j/k

That Kansas surf has to have a ski that is durable!!!!!!!!!!!

 

[superramjet]

sorry bk, I get fired up easy. I need to go ride

 

[sflsurfrider]

LOL @ kansas surf

i chopped up a 550 hull that had a 1.5" pvc pipe for a rear exhaust and when i pulled it out, it was pretty distorted from the heat. it still resembled a length of pipe but it had its share of 'warbled' areas. i dont recall that ever happening with metal.

 

[Idok]

i'm running it now. no problem, no waterbox. 240lb compression 951 motor nasty race fuel exhaust. And I've had some serious cooling problems with it before

maybe you guys are right, I should stop riding my ski. This is a incredible complication, I'll call Jeff right away and tell him he should cease production until further testing can be done on this.

If you feel it's necessary, Jeff will put a metal on in if you ask him.

anyway it's not pvc, its some other composite, but im not a piping expert and I cant remember what it was. I'll ask jeff and post later

urr:

 

[RoyalFlush@PCB]

I was simply looking for opinions, superramjet---thanks for chiming in.:smile:

I just hate to see people scrimp when they are building a ten or twenty thousand dollar ski. It just doesn't make sense to me. :dunno:

The risk or chance of something going wrong outweighs the benefits, IMO.

 

[goodq]

it was pretty distorted from the heat. it still resembled a length of pipe but it had its share of 'warbled' areas.

Would that happen to 150+ rated PVC? Its tough for me to imagine that it would get that hot back there. I guess in this instance it was just a cheap PVC pipe.

Routing it the way I want to route it would be difficult with something other than PVC. It would be another pain to weld it and what not.

But I see your points, I'd rather take the "what if" out of the sentence. Its just that PVS is a very easy to use given what I want to do. I still don't know what I would end up using.

 

[jetskier79]

I will say, metal is ALWAYS a better option than PVC.

That being said, I'm running some PVC piping on my blaster now, and did on my last blaster hull as well. If you've ever seen a limited chamber on a blaster, you know that it creates quite the spaghetti trail of exhaust hose. There is a pipe from factory that has a 180 degree "U" and then a 45(ish) degree bend toward the waterbox.

During my initial installtion I didn't have the tube from factory......and so I made one out of PVC. It's held up really well, and until I put in a GP or Squarenose waterbox, it'll stay just like it is. No issues so far, and I've had the thing out several times for inspection.

 

[SUPERJET-113]

I had a front PVC "T" that lasted about 3 months... It warped and I started leaking exhaust into the engine compartment in the middle of a freestyle run at a competition down in Ponca City, OK. :banghead:

IMO - its more than likely ok back there, but I would opt for the aluminum tubing.