What do I need to convert my Bradford White confined combustion power vented propane hot water tank to natural gas?

Dear jlmack

In general it is just the inset sprayer that has to be replaced by a sprayer for the new gas type.
This inset sprayer regulates the gas-air mix.
Available from the provider of the original unit.

Success !

You will have to get the orifice changed, the air shutter adjusted and replace or adjust the regulator. That assumes that your water heater is designed to be converted. I am not up on that brand.

What do I need to convert my Bradford White confined combustion power vented propane hot water tank to natural gas?
Call around for a conversion kit, it will make your life much easier.