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Updated: Feb 15

Rigid PVC VS Flexible PVC
Flex Pipe VS Rigid PVC


PVC or Poly Vinyl Chloride Pipe is a plastic pipe used to plumb swimming pools and various other components used in modern day living. PVC Pipe has a unit of measurement used to measure the thickness of the walls of the pipe. Modern Pool should be plumbed using a minimum of schedule 40 pvc.

Rigid Schedule 40 pvc can withstand pressure of 135 to 450 psi while flexible schedule 40 pvc has a burst rating of 175 psi according to


  • It is easy to store as it comes in large rolls versus 20' long sticks of rigid pvc.

  • Flex Pipe requires fewer fittings since it can be bent and curved reducing or eliminating the need for glue joints and fittings.

  • Quick and easy to use. Its as simple as unrolling it and gluing in your fittings. It requires little plumbing skills


  • It is not rated for use underground use

  • Flex PVC has a plasticizer in it to make it flexible. Overtime that plasticizer degrades

  • Flexible PVC attracts rodents and termites underground that like to eat it.

  • Flex PVC is susceptable to being crushed or cave in on itself, especially if used on a suction line

  • Flexible PVC is susceptable to punctures since flexible pvc is soft it can be punctured by fractured clean stone backfill creating small pin hole leaks in the flex pipe.

  • Flex PVC has a lower burst rate (175 psi) according to


  • Rigid Schedule 40 PVC is rated up to 450 psi accoriding to

  • Does not contain plasticizers taht will break down

  • Does not attact rodents or termites

  • Is not suscpetable to crushing or cave ins

  • Is rated for direct burial underground

  • Is not affected by type of backfill used around the pipe

  • Creates a higher quality, structurally sound and longer lasting plumbing installation


  • Rigid PVC takes more time to install

  • Rigid PVC requires more fittings to complete a plumbing circuit

  • Rigid PVC comes in 20' sticks so its not as easy to transport or work with

  • Rigid PVC require a higher plumbing skill level to install


The answer is simple. Its quick and easy. A pool builder can save hours per pool by using flex pipe. While this is great when it comes to speeding up the process, it is not great for the long term of your pool project and the potential headaches the use of flexible pvc can bring to you as a pool owner. Another reason is skill. Quite simply it takes more skill to properly plumb a pool with rigid pvc and there are alot of pool builders that just dont have it. Lastly it could be lack of knowledge of your pool builder. Maybe they dont know they are using an inferior product by using flex pipe. Maybe they don't know the pros and cons. If thats the case, should they really be building your pool!


At Pool Pros we use rigid schedule 40 pvc on all of our pool builds. This gives us piece of mind that our clients are not going to experience the potential issues that arrise with flexible pvc. At Pool Pros our goal is to keep all of our customers for life, so we are not going to cut corners and use inferior products just to get your pool done a few hours quicker. If your pool pool builder is using flexible pvc ask them why. Regardless of there answer insist they use rigid schedule 40 pvc. If they won't it may be time to find a different pool builder.


If your builder insists on using flex pipe or flxible pvc it may be time to look for a second opinion on how a fiberglass pool shoul be built. Better yet call Pool Pros in house designers today to go over how we build pools The Pool Pros Way! Pool Designers are standing by @ 1-920-771-0107.


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  • This website contains an abundance of information that has been created over the last decade or more. Some of the content on this site may reflect prices, perspectives, processes, entities, and names that were relevant at the time but may not be as relevant today. Consumers should consult a Pool Pros associate for the most accurate and updated information based on the unique conditions of their property. Consumers should verify specifications with the installing Pool Pros rather than relying on the information on this website, which is not intended to be a final specification.

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