Corrosion flourishes in dry and pre-action systems because air compressors supply unlimited oxygen and water.
It may not seem possible that a new sprinkler system can produce pinhole leaks in less than two years, but it is. The corrosive effects of oxygen trapped in your wet system could be more costly than you think.
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Check one Purge Valve option. One required for each riser. More than one may be selected for quoting purposes.
Do logistics require multiple generators to be utilized? If yes, please note generator grouping in comments.