Although tankless heaters have no storage tank, they still retain a small amount of water (about 1 liter). Winterization steps:
1.Turn off gas and power
2.Disconnect water source and drain the system
3.Pump non-toxic RV antifreeze through the system
Winterization steps may vary by brand and model – always refer to the specific product manual.
If the campground's city water connection pressure is too low, it is recommended to fill the fresh water tank and use the RV's internal water pump to provide stable water pressure.
This is usually caused by mixing cold water at the tap, or by others using a faucet or flushing the toilet while you are showering. Tankless systems are sensitive to changes in water flow – stability depends on a steady flow rate.
The correct method is: use only the hot water valve at full flow, then adjust the temperature via the control panel – rather than mixing in cold water. If you mix in cold water at the tap, it reduces the water flow through the heater, which may cause the burner to shut off or result in unstable water temperatures.
Yes. The control system, ignition device, and safety switches all require 12V DC power to function. If the RV battery is low or voltage is insufficient, the water heater may not ignite or operate properly.
Yes, the vast majority of RV tankless water heaters use propane as their sole heating source. Propane is much more efficient at providing rapid, high-heat output compared to electricity – and electric heating would consume precious RV battery power reserves.
Tankless water heaters heat water only when in use, providing an endless supply with no standby heat loss – they are more compact and lightweight. Tank water heaters pre-heat and store water in a tank (typically 6-10 gallons), have a limited supply and require recovery time after hot water runs out, with standby heat loss – they are heavier and bulkier.
When you open a hot water tap, the flow sensor detects water movement and automatically opens the gas valve and ignites the burner. Water is rapidly heated as it passes through the high-efficiency heat exchanger – taking only about 3 seconds from inlet to outlet. The burner shuts off automatically when the tap is closed.
