🛡️ ASCE 25 / ANSI Z21.70 (0.5g Peak Ground Acceleration Earthquake Auto-Shutoff)

Seismic Gas Shutoff Valve Calculator

Size seismic earthquake-actuated automatic gas shutoff valves (Pacific Seismic / California Valves) on commercial gas service entrances under ASCE Standard 25 & ANSI Z21.70: model automatic valve closure triggered by seismic ground acceleration (≥0.5g / Modified Mercalli VII to prevent post-earthquake gas explosions and fires), and commercial gas safety contracting profits.

1. Project & Operating Inputs

Seismic Valves Installed (Valve Count e.g. 6 Commercial Gas Services)

Gas Main Line Size (Inches e.g. 3.0" Flanged Gas Main)

Customer Bid Price for Supplied & Installed Seismic Valve ($ / Unit)

Pacific Seismic UL-Listed Valve, Leveling Bracket, Master Plumber Labor ($)

2. Financial Breakdown & Yield

ASCE 25 SEISMIC GAS VALVES

Turnkey Seismic Gas Valve Profit

Gas Safety Systems Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost