All valves controlling sprinkler systems shall be
electrically supervised (i.e. tamper switch) – this would include all valves on
the aboveground and private service main, including valves on backflow
preventers whether in pits or inside, to be electrically supervised per 2003
IFC, Section 903.4 - and per Section 903.4.1, the signals transmitted to a
monitoring agency or when approved by the AHJ, a constantly attended location
(typically also requiring the attendees to be qualified personnel trained in
providing this service – see next paragraph for more). The code has exceptions
such as valves in roadway boxes requiring a special wrench to operate, test
valves, valve trim valves, etc., but just because
it is located in a valve pit does not exempt them – frequently the
backflow control valve on the system side in the pit is converted to a PIV, thus
requiring a tamper switch as well.
Also, on sprinkler systems required by
the 2000 LSC to be a ‘supervised sprinkler system’ (not all
2000 LSC occupancy chapters require a ‘supervised’ sprinkler system…), the valve
supervisory signal is also required to be transmitted to a UL Listed monitoring
agency (e.g. central station) per 2000 LSC, Section 9.7.2.1 or to a ‘location
constantly attended by qualified personnel’ (such as where guard service is
provided and they are specifically trained for this service and the arrangement
is approved by the AHJ).