HRJ 100 symbolizes the long and durable tradition that Hydro-Rain has built valves on from the dawn of the plastic valve era. For starters, the valve is molded with heavy-duty commercial grade glass-filled nylon throughout its entire body an industry first in the “jar-top” valve category. Secondly, its debris-tolerant metering pin design provides diaphragm closing dependability and long life. Finally, HRJ 100 is easy to service with a union lid design that needs no tools for removal.