Sch40, Flexible hose for pool plumbing

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manoweb

manoweb

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Apr 14, 2017
152
Hayward CA
Hello, I am planning to build a vinyl pool on my own and I am slowly coming up with all the requirements. The kit I am looking at has options for 1.5 or 2" schedule 40, flexible hose instead of rigid pipes. It is attractive to use flex hose, point to point connections instead of having to deal with many fittings, cuts and joins. However, is 2" considered enough by modern pool standards and/or are there negative aspects to flex hose that I'm not seeing? The alternative is I save the money for the plumbing kit and get my own locally.

Planned size for the pool is 18x36 feet, rectangular with auto cover, 3 to 8 ft deep.
 

Rigid pvc pipe vs flexible pvc for inground pool plumbing

Hi all, run into some issues with plumbing with my inground pool install. I thought I discussed and insisted on rigid underground plumbing pipes because of all the discussion on this forum. So on the install date( today), surprise, its flex spa PVC hose 1.5". It's not specified in the contract...
www.troublefreepool.com www.troublefreepool.com

Flexible PVC is not as durable as rigid PVC. Long term you are more likely to have problems with it.

Flexible PVC can also be chewed by termites. Use your favorite search engine with “flexible pvc termites” for more on that.
 
OK thanks. From the pictures I cannot understand if the internal part is smooth or not, this has an impact with the pump etc.
I was under the impression that schedule 40 defined a specific wall thickness, so why is the flexible less durable? I'll look into it. I also wanted to insulate the hoses/pipes, and I do not have any specific solution for that yet.
 
manoweb said:
Interesting, thanks for sharing this. Speaking of regular, rigid PVC pipes, is sch 40 considered enough?
Click to expand...

Yes, make sure pipes are properly marked and don't use DWV fittings.

Types of PVC

Pool PVC (polyvinyl chloride) should be marked "Schedule 40". Schedule 40 PVC is made for water under pressure. If the pipe has ASTM D 1785 on the pipe, it's suitable for pressure applications. A rating of ASTM D 2665 means non pressure applications and should not be used for pools.

A pipe can be dual rated ASTM D 1785 and ASTM D 2665, but it has to say ASTM D 1785 if it's going to be used for pressure.
 
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