Abstract: A new sprinkler head for sprinkler installations is claimed which is compact and reduces production costs. In addition, the structure makes possible installation to a distribution pipe ahead of fitting a ceiling and easily enables checks for leakage. In detail a main body has an upper body connected to a water distribution pipe in a ceiling, the main body has an upper body with a valve seat which has a shoulder situated at the lower end of the upper body, and a lower frame which has a plurality of lugs facing inward. A nozzle has a plurality of discharge apertures at its lower end and an outwardly flared nozzle retainer which moves freely up and down inside the upper body and prevents movement of the nozzle passed the shoulder. A cap has a seal which seals the valve seat outside of the upper body at the bottom of the nozzle.