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Backflow Preventer Valves
Thank you, I appreciate the comments.- jamz2603
- Post #4
- Forum: NFPA (fire) Code Issues
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Backflow Preventer Valves
I have a customer wanting to change the valves on an existing backflow from Butterfly to OS&Y for their sprinkler system. I was always under the understanding that you cannot simply change out the valves but would have to change out the entire assembly, otherwise it would become unlisted. Am I...- jamz2603
- Thread
- Replies: 3
- Forum: NFPA (fire) Code Issues
