GAS SUPPLY COUPLING FOR A WATER HEATER

摘要

A gas supply coupling is disposed within and extends through an opening of a combustion chamber for a water heater. The coupling including a fitting which is a relatively inexpensive stamped component. A stepped tubular connection extends from a plate and includes a first portion having a first diameter which neck s down to a second portion having a second diameter less than the first diameter. The stepped tubular connection receives a gas supply tube into the first portion and a g as supply line over the second portion. The tubes are braised to the stepped connectio n. Other gas supply couplings include a machined fitting and a direct connectio n between a gas supply tube and a gas supply line in which the gas supply tube itself provides for both the seal to the shield and the connection to the gas suppl y line.