It's clear that gridded dry systems are no longer allowed by NFPA 13 (for the last 30-40 years or so), but what about a looped dry system?
If I understand it correctly, gridded dry systems are not allowed because water delivery time is typically hindered, and gridded systems may not be set up to drain particularly well.
Is that true of looped dry systems? If the total volume of a looped dry system is small (200-500 gallons), and water delivery time is not an issue, I could see major advantages to looping a dry system for areas like parking garages or attics. Thanks in advance.
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