The Lansdale Model LVOUN Orifice Union is a ½-inch brass union specifically designed for use in the pressure sensing line of fire pump systems. Engineered to introduce a controlled pressure drop, this orifice union features a 3/32-inch orifice plate that helps prevent nuisance fire pump starts and false flow signals caused by sudden pressure spikes or system surges.
Manufactured from B16 brass, the LVOUN orifice union offers durable performance for fire protection service, with a Class 125 rating and a working pressure of up to 200 PSI WOG. The rough brass finish provides a robust, field-ready appearance suitable for mechanical rooms, fire pump houses, and riser assemblies. This orifice union is intended for clear water service only, ensuring the small 3/32-inch opening remains free from sediment and debris that could affect sensing line performance.
Ideal for fire sprinkler contractors, pump installers, and system designers, the Lansdale LVOUN helps stabilize pressure sensing to the fire pump controller, reducing unnecessary pump cycling and improving overall system reliability. Because it contains lead, this product is not suitable for potable water or systems intended for human consumption, making it best suited for dedicated fire protection water supplies and non-potable applications.
