千住スプリンクラー株式会社 manufactures closed and open sprinkler heads, alarm and flow-detection valves, deluge valves and foam concentrates, with over 100 million heads produced. Its heads hold 日本消防検定協会 型式承認 for 閉鎖型スプリンクラーヘッド and are additionally UL Listed and FM Approved for export markets — the SS9521 concealed pendent, for example, is UL Listed quick-response and FM Approved standard-response. It is a 正会員 of 日本消火装置工業会.