Generac — Installing and Connecting Gas Lines
Installation · Fuel System
From a Generac service manual — check it applies to your exact model before use.
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Before you start
- Gaseous fuels are highly explosive
Procedure
- Use AGA-approved gas pipe and quality pipe sealant
- Install manual full flow shutoff valve near generator
- Connect flexible fuel line with as few bends as possible, do not bend
- Remove top lid and rear panel
- Check for leaks with soap solution at connection points
- Close gas supply valve, remove test port, install manometer
- Slowly open gas supply valve, verify pressure within spec
- Close gas valve when complete
- Reinstall rear access panel and top lid
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Natural gas fuel pressure 3.5-7" water column (7-13 mm mercury)
- LP vapor fuel pressure 10-12 Amazon eBay FridayParts $169.30" water column (19-22 Amazon eBay FridayParts $39.99 mm mercury)
Source: Generac service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.