The fire hydrant connection for fire brigade truck pump UNI10779 installed as derivation of the hydric network ring, with which the fire brigade truck can be connected to the water flow during emercencies. The horizontal version with flow direction from right to the left, check valve with opposite orientation whilst entering the water and safety valve set to 12 bar is the normally model supplied. For alternative ones, add to the id. reference : V for vertical model, C for opposite flow ( from the left to the right), S for anti-freeze discharge. Price on demand.