pauldub wrote:
Thanks folks. Sounds like it should be as easy as I expected. I'll probably need to wait a month or so until my tank is empty. It's full right now and our only propane usage is for hot water and cooking.
Start using the furnace to empty the tank. Depending on the temps, it may not take long. Once the furnace won't light, it'll be a lot safer to swap that valve.
Use a fan to keep the fumes from collecting if there's no breeze. Every year there's a house that blows up violently because the gas was allowed to accumulate until they found an ignition source. Respect the power of those fumes!