Fire hose valves according to this standard are provided for connection to fire water systems according to DIN 14462. According to DIN 14462 and DIN 1988-600 only valves of size 1 and equipped with a safety combination in accordance with 5.2 of this standard, shall be used also for direct connection of wall hydrants type S to the potable water supply. Note: Requirements and further provisions are contained in DIN 1988-600. Fire hose valves with limit switches (e. g. micro end switches) are used to obtain signal message when operating a valve. They are commonly used for the initiation of filling and draining devices in accordance with DIN 14463-1 in fire extinguishing pipe systems "wet/dry" and for the control of pressure boosting systems for extinguishing water pipes "wet ".