Understood, however that prompts my question.
Why do you need a PIV? Doesn't the backflow serve as a control valve?
It's already difficult enough by having two control valves on a system, on opposite ends of the backflow, why do you need to add a third control valve (PIV)?
Doesn't that increase the opportunity for the system to be out of service, particularly if the monitoring (tamper switches, locks, etc) were compromised?
sincerely,
Ken Wagoner, SET
Parsley Consulting
3002 Younger Drive
Harrisonville, Missouri 64701-3909
Phone: (760) 745-6181
Visit the website
Parsley Consulting
3002 Younger Drive
Harrisonville, Missouri 64701-3909
Phone: (760) 745-6181
Visit the website
On 10/20/2025 11:45 AM, Tim Easter
wrote:
Currently only piv. Want to remove piv and just install main control valve at riser. Piv didn't close all the way. Been underground a long time.
On Mon, Oct 20, 2025, 12:36 PM Parsley Consulting <[email protected]> wrote:
Tim,
I won't copy what Craig and Tom have said, only to offer my own thoughts.
If the backflow serves only one sprinkler system, the OS&Y valves there function as a system control valve. Indeed §16.9.3.3.5 in the '22 and '25 editions of -13 specifically permits them to serve as a control valve to a sprinkler system provided they are listed for fire protection. And the supervision requirements of §16.9.3.3 would apply as well.
Why are you adding a PIV, and installing a control valve at risers? Is there more than one system?
sincerely,Ken Wagoner, SET
Parsley Consulting
3002 Younger Drive
Harrisonville, Missouri 64701-3909
Phone: (760) 745-6181
Visit the website
On 10/20/2025 10:54 AM, [email protected] wrote:
We are trying to remove PIVs, and install a main control valves at risers. AHJ is saying we must have a PIV. Also, we have BFPs before the PIVs. Can anyone help me find in NFPA 13 or 24 the section about PIVs?
_________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]
_________________________________________________________
SprinklerForum mailing list:
https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org
To unsubscribe send an email to [email protected]
_________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]
_________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]
