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
