Pacific Seismic Products (PSP)

Pacific Seismic Products (PSP) is a leading supplier of earthquake-activated automatic gas shut-off valves and seismic devices. Established in 1989, PSP acquired the rights to Koso's seismic valves and has since expanded its product line to include vertical and specialized valves in addition to the horizontal ones. With a hi-tech manufacturing facility in Lancaster, California, PSP engineers, die casts, sand casts, CNC machines, and assembles its own parts for products. The company ensures high-quality control through multi-stage testing, offering a complete line of seismically-activated gas shut-off valves in various sizes, ranging from 3/4" to 8".