Quick question for everyone here. When the situation prevents one from being
able to provide a calculation back to the U.G. connection at the street when
can you calculate the system back to the gauge on the riser ?
For example, if you have, say, 50 psi city pressure (worst case) on a system at
We installed an isolation valve on an propylene glycol antifreeze loop.
Unfortunately, we were told the system was about 55 gallons. It was closer to
90 gallons. We only had enough antifreeze for 60 gallons. We used what
antifreeze we had, and finished the job with straight water. My
What was the concentration of the propylene glycol you filled with and its
freeze point?
Forest Wilson
Fire Sprinkler Contractor
937-736-0425
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