Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Hello, my name is ***** ***** I look forward to helping you. Are we working with a Rinnai?
Rinnai DOES offer a field conversion kit. You should contact them directly to ensure you get the right one. Have your serial number ready. It'll consist of a new gas manifold and a new gas valve along with instructions for changing the dip switch settings on the control board. You'll also need a manometer to set gas pressures.
If this answers your question completely please leave me a positive rating and its are greatly appreciated.