There are always questions regarding the requirements for spill containment for vented cells.  The current standards discuss spill containment requirements and the requirements for neutralizing separately.  It’s clear in the current standards that for valve regulated lead acid cells spill containment is not required for VRLA installations; however, there are still requirements for neutralizing. An excerpt of the requirements in current codes and standards is attached as a downloadable pdf file.

Battery Code Excerpts – Spill Containment