Firewalls in Attic with Sprinkler System
Hi all, I designing an attic dry system for an existing building that we believe was built in the 70s. The existing system was not installed when it was originally built but needs replaced because the sch.7 lightwall pipe was threaded and installed through and it leaks like crazy. To install the new system we are having to create new penetrations through the firewalls and my question are the firewalls necessary anymore? From my experience they were needed to omit a sprinkler system and not required when one was installed. We don’t plan on removing them, we are only trying to keep the owner and us from having to reseal and fix any holes that we may put in them.