For gas water heaters burning not more than 40,000 BTU's per hour, what is the maximum length for approved metal tubing connectors?

For gas water heaters that have a maximum input of 40,000 BTUs per hour, the regulations stipulate that the length of approved metal tubing connectors should not exceed 18 inches. This is primarily for safety and to ensure efficient gas flow to the appliance.

The limitation on connector length helps minimize the risk of gas leaks and enhances the ability to service the water heater effectively. Longer connectors could create unnecessary bends or kinks, which may impede gas flow and increase the likelihood of connection failures. Additionally, maintaining a shorter length helps ensure that the appliance operates efficiently without loss of pressure.

Understanding these specifications is crucial for plumbing contractors to ensure compliance with local codes and to guarantee the safe operation of gas appliances. Knowing the maximum length of connectors also aids in proper installation practices.