It is possible that some of the anti-freeze moved around due to density differences with the water- the 'water' sample that you pulled may not be representative of all of the liquid in the system. It would depend on the layout of the piping to see if that is a possibility.
On the other hand: you were told it was a closed loop system... any way to verify that? You were also told it was a 55 gallon system, so the person you spoke with may not have a complete understanding of the system design. Matt Grisé PE*, LEED AP, NICET II Sales Engineer Alliance Fire Protection 130 w 9th Ave. North Kansas City, MO 64116 *Licensed in KS & MO 913.888.0647 ph 913.888.0618 f 913.526.7443 cell www. AFPsprink.com -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Douglas Hicks Sent: Tuesday, October 20, 2015 10:00 PM To: [email protected] Subject: Antifreeze system 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 thought was to drain the water, monitoring the liquid until we got to the antifreeze. Then we would fill the system with an antifreeze mix. Today, we returned to the job site with 30 gallons of antifreeze. We closed the isolation valve and drained out 5 gallons. The drained water tested to 15°F. We tested the fluid at the other end of the piping. It also tested 15°F. I thought the antifreeze loop was a closed system. How did the antifreeze and water get mixed in a closed pipe system? Douglas Hicks General Fire Equipment Co of Eastern Oregon, Inc _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
