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I have wrote up several pump sensing line locations where they tap into the system. I understand it that they need to be be install between the discharge check and discharge control valve.
A contractor keeps installing on the pump bypass and says it works fine. Is this compliant? Is there a downside to attaching to the bypass? Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
5 Comments
Anthony
4/15/2024 08:45:02 am
The fact that it's not code acceptable is the problem. Technically the sensing line will "work" anywhere after the pump and bypass checks but work and code compliant are worlds apart.
James Phifer
4/15/2024 08:52:38 am
It is not compliant. NFPA 20 is clear.
Glenn Berger
4/15/2024 03:10:43 pm
The Contractor is just repeating his error. NFPA 20 is clear and needs to be followed.
Casey Milhorn
4/15/2024 03:16:53 pm
Others covered it well, follow NFPA 20. If you wish to isolate the rest of the system down stream but still test the operation of the pump, you can't if the test connection is located after the isolation valve.
Colin Lusher
4/16/2024 10:58:54 am
If they're connecting it to the bypass line, they're connecting DOWNSTREAM of the discharge control valve, which does not meet NFPA 20 requirements. This is a problem; if the control valve were to be shut, the pump would not be able to read discharge pressure. Leave a Reply. |
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