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Earthquake Valves

Pacific Seismic Products (PSP) is the world's leading supplier of earthquake-activated automatic gas shut-off valves and other seismic devices. 

PSP was incorporated in 1989 when it acquired the rights to Koso's seismic valves. PSP has continued to develop its gas shut- off valves by adding vertical and specialized types to its already successful horizontal line, giving PSP the most complete line of seismically-activated gas shut-off valves in sizes ranging from 3/4" to 8".

Having a complete hi-tech on-site manufacturing facility in Lancaster, California, PSP is able to engineer, die cast, sand cast, CNC machine, and assemble their own parts for its products.

A state-of-the-art quality control process leads the industry with high-tech, multi-stage testing of every valve manufactured, assuring you absolute reliability from a "Made-in-America" product.

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  • $0.00 - $229.95
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    $229.95 - $249.95
    $229.95 - $249.95
    $229.95

    3/4" Earthquake Shut-off Valve

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

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    $0.00 - $229.95
    $0.00
    $229.95 - $249.95
    $229.95 - $249.95
    $229.95
  • $229.95 - $249.95
    $229.95 - $249.95
    $229.95 - $249.95
    $229.95

    1" Earthquake Shut-off Valves

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

    View full details
    $229.95 - $249.95
    $229.95 - $249.95
    $229.95 - $249.95
    $229.95
  • $249.95 - $279.95
    $249.95 - $279.95
    $249.95 - $279.95
    $249.95

    1-1/4" Earthquake Shut-off Valves

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

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    $249.95 - $279.95
    $249.95 - $279.95
    $249.95 - $279.95
    $249.95
  • $329.95 - $359.95
    $329.95 - $359.95
    $329.95 - $359.95
    $329.95

    1-1/2" Earthquake Shut-off Valves

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

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    $329.95 - $359.95
    $329.95 - $359.95
    $329.95 - $359.95
    $329.95
  • $589.95 - $1,249.95
    $589.95 - $1,249.95
    $589.95 - $1,249.95
    $589.95

    2" Earthquake Shut-off Valves

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

    View full details
    $589.95 - $1,249.95
    $589.95 - $1,249.95
    $589.95 - $1,249.95
    $589.95
  • $895.95 - $1,499.95
    $895.95 - $1,499.95
    $895.95 - $1,499.95
    $895.95

    2 1/2" Earthquake Shut-off Valves

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

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    $895.95 - $1,499.95
    $895.95 - $1,499.95
    $895.95 - $1,499.95
    $895.95
  • $1,399.95 - $1,599.95
    $1,399.95 - $1,599.95
    $1,399.95 - $1,599.95
    $1,399.95

    3" Earthquake Shut-off Valves

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

    View full details
    $1,399.95 - $1,599.95
    $1,399.95 - $1,599.95
    $1,399.95 - $1,599.95
    $1,399.95
  • $1,699.95 - $1,995.95
    $1,699.95 - $1,995.95
    $1,699.95 - $1,995.95
    $1,699.95

    4" Earthquake Shut-off Valves

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

    View full details
    $1,699.95 - $1,995.95
    $1,699.95 - $1,995.95
    $1,699.95 - $1,995.95
    $1,699.95
  • $3,699.95 - $3,699.95
    $3,699.95
    $3,699.95 - $3,699.95
    $3,699.95

    6" Earthquake Shut-off Valves

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

    View full details
    $3,699.95 - $3,699.95
    $3,699.95
    $3,699.95 - $3,699.95
    $3,699.95
  • $9,899.95 - $9,899.95
    $9,899.95
    $9,899.95 - $9,899.95
    $9,899.95

    8" Earthquake Shut-off Valves

    Pacific Seismic Products

    Pacific Seismic Products is the world's leading supplier of earthquake-activated automatic gas shut-off valves. Available in sizes 3/4" to 8" with ...

    View full details
    $9,899.95 - $9,899.95
    $9,899.95
    $9,899.95 - $9,899.95
    $9,899.95