Use CPVC for Fire Sprinkler Drain Pipe?

11/5/2019

Can we use CPVC pipe material for the inspector's test and main drain?

Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe

4 Comments

Paul Pinigis

11/5/2019 10:27:23 am

Once the water is past the inspector's test valve, or main drain valve, it is beyond the sprinkler system so the material choice is not limited.

John Lane link

11/5/2019 11:16:15 am

I agree with Paul, It is a drain, as long as it still routes the water to the outside or floor drain, it is not a problem.

Alex Hoeft

11/5/2019 11:52:55 am

It looks like the only thing regulated by NFPA 13 for drain piping regarding material type is corrosion resistance when buried underground.

8.16.2.6.3: "Where drain pipes are buried underground, approved corrosion-resistant pipe shall be used."

Drain piping also does not need to be listed (6.1.1.5), which further supports the notion that plastic is okay.

James Phifer

11/5/2019 12:55:44 pm

CPVC piping must not be exposed to sunlight for long periods of time per the manufacturers data sheet. so as long as the drain piping is located inside, you should be ok. The piece sticking through the exterior wall should be galvanized in my opinion.

Free Signup

Subscribe and learn something new each day:

Community

Thank You to Our Top December '19 Contributors!

1. Mike
2. Sean
3. James
4. Mike L.
5. Wayne A

6. Marc V.
7. Colin L.
8. Alfrid
9. Vinnie
10. Marina A

Your Post

SUBMIT A QUESTION

The Toolkit

Sprinkler Designer or Engineer?

Get all of our tools, including the Sprinkler Database, Friction Loss Calculator, Fire Pump Analyzer and more:

FREE 30-DAY TRIAL

GET THE TOOLKIT

Filters

Exam Prep

2019 PE Prep Guide
(Available Now!)

PE Prep Series
(Available Now!)

Current Leaderboard
(Click to enlarge)

PE Problems

Visit July-October for daily Fire Protection PE Exam sample questions.

Solutions are posted the day after posting.

Comment with your solutions, questions or clarifications.

Please note that questions posted are unofficial and in accordance with NCEES rules are intended to be similar to actual exam questions, not actual exam questions themselves.

RSS Feed

Home - About - Blog - Contact - Exam Prep - Store

Copyright © 2020 MeyerFire, LLC
The views, opinions, and information found on this site represent solely the author shown and do not represent the opinions of any other party, nor does the presented material assume responsibility for its use. Fire protection and life safety systems constitute a critical component for public health and safety and you should consult with a licensed professional for proper design and code adherence. Some (not all) outbound links on this website, such as Amazon links, are affiliate-based where we receive a commission for orders placed elsewhere.