6g40-36f1 Manual — Richmond Water Heater Model

The manual specifies minimum clearances for this model:

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Warning: Avoid sites that require credit card information for a “free manual.” The official manual is always free in PDF format. The manual specifies minimum clearances for this model:

Likely cause: Loose water connections or leaking T&P relief valve. Manual solution: Tighten the dielectric union fittings. If the T&P valve leaks, test it by lifting the lever. If it continues leaking, replace it with an identical 150 PSI/210°F rated valve. Warning: Avoid sites that require credit card information

The manual details the start-up procedure for the gas control valve (typically a Robertshaw or Honeywell unit):