On March 11, I got a call to investigate a low air signal. I arrived on scene and found the water pressure at 225 pounds, air at 52 pounds. The FACP showed normal. I shut the main control valves off. I opened the main drain to relieve the water pressure, leaving the valve open 2 or 3 turns. I opened the priming water drain and got only air. I opened the condensation drain and let the air bleed to 30 PSI. I let the riser mount compressor build to 47 PSI, where the compressor shut off. I opened the butterfly valves, the water pressure was at 80 PSI. The compressor kicked on and shut off twice, in rapid sequence.
The system is at the end of the city water line and at a low point. In September, the water pressure was 70 PSI, the air was 45 PSI. The gauges were replaced or compared with certified gauges in September. There is no backflow or pressure reducing valve on the system. I have not contacted the water department to ask if there have been any pressure bumps. But, another account a few blocks away did not show the 225 water PSI on their wet system. We service 100% (all 3 ) of the sprinkler systems in the community. Any suggestions? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20130321/cac9a629/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
