Knox FDC Spanner Wrench Aug. 13, 2018 The Knox FDC Spanner Wrench is a pocket-sized multipurpose tool that can quickly unlock and lock the Knox FDC, Standpipe and Storz Locks.

The standpipe system should, also be augmented by another fire department pumper if additional lines are stretched. This can be done via the siamese or the first floor outlet.