Should the trim for a dry pipe system be black steel or galvanized?
Reliable offers both black steel and galvanized trim styles for use with our dry pipe valve trims. However, the installing contractor needs to be aware the galvanized trim is a requirement in those jurisdictions following The National Fire Alarm Code NFPA 72 (1991 or 1993 editions, section 5-7.2, and NFPA 72, 1990 edition and earlier, section 3-4.1.2) regarding water-flow alarm initiating devices (pressure switches). This section requires that “piping between the sprinkler system and a pressure actuated alarm-initiating device shall be galvanized or of nonferrous metal or other approved corrosion-resistant material of not less than 3/8″ nominal pipe size.” This is not a concern with our Model LDX Dry Pipe Valve Systems since the LDX trim only comes in galvanized. However, if just a water motor gong is used, black steel trim is permitted.
