Gas Line Installation

Purpose

Gas line installation procedures for new appliance connections, line extensions, and gas system work.

When to Use

• New gas line for appliance (water heater, range, dryer, fireplace)
• Gas line extension or relocation
• Gas system upgrade

Procedure

Verify BTU demand of all appliances on the system

Size pipe correctly using gas pipe sizing charts — account for total system demand and run length

Use approved materials: black iron pipe, CSST (with proper bonding), or PE for underground

Install with proper support and hangers per code

Install drip leg at each appliance connection

Install shutoff valve at each appliance

If using CSST: bond per manufacturer requirements and code, route to avoid damage

Pressure test entire new line: 10 lbs for 15 minutes — zero drop

Connect appliances with new approved flex connectors

Bubble test every connection

Restore gas and verify all connected appliances operate properly

CO test all gas appliances after work is complete

Pull permit and schedule inspection per local requirements

Important Notes

• Gas line sizing is the most critical step — undersized pipe causes poor appliance performance
• Never reuse old flex connectors
• CSST bonding is a code requirement — improper bonding is a safety and liability issue
• Pressure test before connecting any appliance — no exceptions
• Ohio requires licensed plumber for gas line work
• Permit required in most municipalities

Related SOPs

• Gas Line Repair & Installation (Service) — service tech gas work
• Gas Line Diagnostics — testing and leak detection
• Permit Application & Requirements — gas work permits
• CO Detection & Response — post-work CO testing