CPVC Allowed Exposed Through Storage Room?

1/1/2024

Is CPVC allowed to be run exposed through a small storage room?

Thanks in advance.

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10 Comments

Alex

1/1/2024 10:11:13 am

There is nothing that says it is not permitted, contingent it meets the manufacture guidelines. I would defer to the cut sheet of the piping you are using on your project.

Mark Harris

1/1/2024 12:43:34 pm

Agree with Alex to look at the listing. Was long time ago but I remember some projects where we transitioned to steel for the exposed pipe in kitchen and storage rooms.

Ricardo Sellek

1/2/2024 03:37:41 pm

The CPVC cannot be exposed in kitchens due to the presence of grease laden kitchen exhaust which if I remember correctly can possibly breakdown the pipe over time.

Glenn Berger

1/1/2024 06:32:03 pm

It depends on the actual size and contents of the storage room. The term small is relative; likewise with the term of room names being storage.

Jesse

1/2/2024 07:35:10 am

Agree with Glenn here. "Small" doesn't tell us much. CPVC is listed for Light Hazard, and this storage room likely won't be Light Hazard. CPVC can be used for small areas of OH1 / OH2 occupancies, generally less than 400-sq, ft.

1/2/2024 09:02:04 am

My response is based on the CPVC product that we use.

You can run CPVC exposed if the storage room is less than 400 sqft. However, the limitations of exposed CPVC make it practically hard to do. I'm assuming if you want to run exposed then every other trade is also exposed and may present obstructions.

We typically convert to steel which is not costly.

Randy Kimbro

1/2/2024 10:36:53 am

As an AHJ, we have been through this in detail over the last few months on two construction projects. If you are using BlazeMaster CPVC, it must be protected behind drywall or drop ceiling. Or if run exposed it can only be installed against a flat horizontal ceiling. The BlazeMaster installation manual is very specific about this and we confirmed all of those details directly with BlazeMaster. I hope this helps.

Additionally, any overarms must have hangers close to the vertical sprinkler head drop portion to prevent flexing and uplift when the head activates. This results in more hangers/restraints than you would normally expect.

sean

1/2/2024 08:59:16 pm

many cpvc manufacturers now allow accessory room 400 sq.ft. or less to have sprinkler piping to be cpvc

Danial Bartle

1/3/2024 07:49:54 am

The temperature rating of the heads cannot be above 165 either.

Mike

1/19/2024 02:38:36 pm

Check the manufacturer listing. Storage is not light hazard.

Very clear and strict guidelines for exposed CPVC. Accidental breakage among them and fire resistance.

Put in transition couplings and use steel.

Do it correctly or you're putting your company at life time risk to save a few dollars.

It's not worth it.

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CPVC Allowed Exposed Through Storage Room?

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