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Old 01-06-2016, 11:50 AM   #21
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Quote:
Originally Posted by mccmech View Post
My .02 would be that it's for the fire sprinkler system. That's typically a blow-down from what I've watched on job sites. Irrigation would also have a back flow valve on the building interior.
Fire system drain. Water will run out during a churn test, or draining the system, there will be a 2 port connection nearby for fire pump flow testing.
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Old 01-06-2016, 01:34 PM   #22
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If its on a wet system it is for testing flow switches. Usually labeled "inspector's test valve." The piece on the end is a cut off sprinkler head. That chokes down the flow so when you test you are simulating the volume of water emitted by one sprinkler head. You open valve and time how long it takes for the flow alarm to show up on the fire panel.
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Old 01-06-2016, 02:32 PM   #23
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Yep. Exactly. The main drains are usually 2" and they are normally close to fire department connection
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Old 01-09-2016, 02:15 PM   #24
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I would suggest not messing with it if you don't know what it is.
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Old 01-09-2016, 04:20 PM   #25
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I would suggest not messing with it if you don't know what it is.
Maybe call a plumber if there is a concern...



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