I'm looking at a tankless hot water heater (Rinnai V65EP) with a 3/4" NPT propane input. The manual says that a 1/2" propane feed is acceptable if it is relatively short. Required gas supply pressure is 8.0 ‐ 13.5 inch W.C.
I am planning on putting a dedicated 40lb (10gal) propane bottle right next to the water heater. The propane line will only be a few feet long, and the water heater will be the only appliance drawing from this tank.
Is this a workable plan?
What regulator and other equipment should I install between the tank and the heater?
- Installation manual: http://www.rinnai.us/documentation/downloads/U307-1120.pdf