PSA: Do not use flex PVC under too much pressure

I had extra so i used flex PVC 2 inch in my AGP build. I have sprung two leaks in the flex PVC between the pump and filter (i had extra so used some there). Leaks were NOT at the connections points.

That’s interesting, Think it could be quality control issue? I used a different brand years ago and still have some in place.

I do suspect Amazon has sold some cheaper knock off products. Had a couple issues with car parts that I am pretty sure where genuine
 
Im wondering the same. It looks like good quality. Thick, not easy to cut. Its suprising. Cant trust it now
Yes, I loved it. I replaced my pump and the new one was about 1/2” taller so used my last piece. I bought mine years ago from a plumbing store online.
I am careful what I buy on Amazon lately. Seems it’s hit or miss
 
Last edited:


When is "schedule 40" not schedule 40?

There are two "Schedule 40" ratings.

One is for dimensions and the other is for usage. Our flexible PVC is the same dimensions as Sch 40 pipe, but it's different from rigid pvc pipe in 2 very big ways:

1) Flexible PVC pipe is not rated for potable (drinking) water, and

2) Flexible PVC pipe will not take the same pressure rigid pvc will. (See PVC Pipe pressure & dimension chart.)

Also, Flexible PVC pipe is treated as a hose by the building industry, not a pipe.

Thus our hose fits Schedule 40 fittings (dimensionally) and can be used in place of schedule 40 pipe for many applications, but it does not meet all the requirements for schedule 40 pipe. (If you look at the specification on the PVC Pipe pressure & dimension page you'll see the pressure ratings are not the same as schedule 40 pipe.)

So, while we call it "flexible pvc pipe" in reality it's a hose that fits perfectly into schedule 40 fittings, but it has a lower pressure rating, can't take dead head pressure and it not approved for potable water.

(Potable water means approved for human consumption.)

Irrigation, fish, nurseries, farming, livestock, etc are all okay provided you don't exceed the pressure ratings.

There is also some information on this on Understanding and Identifying Your Pipe & Fittings.

1630771437312.png
1630771502438.png
 
Regular rigid (non-flexible) pipe will be marked ASTM D 1785, which indicates pressure rated.

The regular rigid pipe should also be labeled NSF-PW (National Sanitation Foundation - Potable Water), NSF-61 and Schedule 40 PVC.

 

Enjoying this content?

Support TFP with a donation.

Give Support
I think that you got conduit and not pool rated product.

The pool product looks like this with the number 3342.
1630774419821.png

The conduit is available in black and says Sealproof liquid tite flexible conduit.


1630774496329.png
Does the product have any writing on it?
 
I think that you got conduit and not pool rated product.

The pool product looks like this with the number 3342.
View attachment 370005

The conduit is available in black and says Sealproof liquid tite flexible conduit.


View attachment 370006
Does the product have any writing on it?
That might explain the leaks. The only issue I had was some said use primer and some said don’t but if I didn’t it always leaked. To be safe I used parts with deep slots and let them dry over night :)
 
  • Like
Reactions: JamesW
actually this is the exact one i got
amazon site says
Maximum Pressure60 Pound per Square Inch
home depot site says perfect for pools

im asking for a refund ill update u guys


 
  • Like
Reactions: markayash
actually this is the exact one i got
amazon site says
Maximum Pressure60 Pound per Square Inch
home depot site says perfect for pools

im asking for a refund ill update u guys


Amazon is pretty good about refunds if you tell them the facts. Might have to start a chat
 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.