Gas Line Diagnostics & Leak Detection

Purpose

Gas line diagnostic and leak detection procedures.

When to Use

• Gas smell, suspected leak, after gas line work, during gas appliance service

Leak Detection

Use approved leak detection solution (never flame)

Apply to all connections: flex connectors, unions, valves, appliance connections

Bubbles indicate leak — mark location and determine severity

Use gas detector for small or hard-to-find leaks

Document findings with photos

Pressure Testing

Isolate gas line section

Apply 10 lbs pressure

Monitor gauge for 15 minutes

ANY drop indicates leak — must locate and repair

Do not restore gas until line holds pressure

After Flex Line Replacement

Bubble test all new connections

If no leak at flex but smell persists, check gas valve connections

Check all upstream connections that may have been disturbed

Document negative leak test in ServiceTitan

Gas Odor but No Leak Found

Do NOT dismiss — recheck all connections systematically

Check for dead pilot light on any gas appliance

If cannot locate source, shut off gas at meter and call gas company

Inform customer of situation and actions taken

Important Notes

• Gas leaks are life-safety — treat every suspected leak seriously
• Strong gas smell upon arrival: do NOT enter — call 911 from outside
• See Gas Leak Response Protocol for full emergency procedures
• Ohio requires licensed plumbers for gas line work

Related SOPs

• Gas Leak Response Protocol — emergency response
• Gas Line Repair & Installation — repair procedures
• CO Detection & Response — CO from gas appliances