We don't do liablity forms for acceptance testing. Acceptance testing is required in the codes, and the installers should be able to perform the majority of the tasks needed while we are witnesses. Standpipes are a slightly different animal since we have to connect attack lines to them.
NFPA 14, Chapter 9, lays out acceptance requirements for standpipe systems. In particular, for manual systems (9-5.2), "a fire department pumper or portable pump of adequate capacity shall be used...", so there is implication that the fire department needs to be involved to assist with flowing water through standpipes. It's also a training opportunity for the front line crews.
Assuming the acceptance testing is done methodically, within the specifications of the system and under the guidance of the installer, which is the bigger liability, finding leaks and failures prior to building occupancy, or finding them when it's on fire?
