1/2" Threaded Brass with Restricted Orifice Union
3/32" Hole
For use in Fire Pump Controller Lines
The union is fitted with a 3/32” orifice which will provide adequate pressure drop into the sensing line without allowing unnecessary pump starts due to major pressure fluctuations that may be indicated in the larger diameter (1/2”) line.
The union is only allowed to be used where the water is clear and will not allow sediment to block the 3/32 inch hole.