The piping system consists of a main pipe centrally located in a frost-free
environment. Depending on the case at hand, one or more pipes lead to each of the designated
fire sections. In each section, the front end of each supply pipe is fitted with a shut-off
valve with remote indication. The piping system consists of stainless steel. The main pipe is
joined with high-quality press fittings, the distributor pipes and the pipes connecting to the
nozzle are joined with cutting rings.
The water consumption per nozzle varies between 2.8 and 25 liters (0.74 and 6.6 gallons) per
minute, depending on the characteristics of the room. This means a significant reduction of
water consumption, compared to a traditional sprinkler (80–250 liters = 21–66 gallons per
minute) and also permits smaller pipe diameters. The main pipe usually has a diameter of only 33
or 42 mm, and pipes leading to the nozzles have diameters of 10 or 12 mm, allowing extremely
Nozzle heads may be supplied with either open (deluge) nozzles for “dry piping” systems or
closed nozzles with “melting fuses” or “glass bulbs” for “wet piping” systems.