Question
How do I winterize the water system in a heated camper van?
Short Answer
Drain fresh and gray tanks, use RV antifreeze in the lines, or install a heated water hose. Do not let water freeze in pipes.
Drain the Tanks
Empty fresh water and gray water tanks before a hard freeze. Water expands when it freezes and cracks pipes.
Blow Out Lines
Use an air compressor to blow water out of the lines. Open all taps. Close them once the flow stops.
RV Antifreeze
Pour non-toxic RV antifreeze into the fresh tank and run each tap until pink liquid flows. This protects lines in freezing weather.
Heated Hose
If you use shore water in winter, use a heated water hose with built-in thermostat. Insulate the fresh tank with foam.
Result
A winterized water system survives −20°C without damage. The heater keeps the living area warm.
How Renqiu Chiyu Supports This Application
Renqiu Chiyu Auto Parts Co., Ltd. has manufactured diesel parking heaters in Renqiu, Hebei since 2020. The CY-5001 series is offered in 12 V and 24 V versions, 2 kW and 5 kW outputs, and is certified to EU 2015/1188 with FCC ID 2BOWN-CY-001. Each unit ships with a multi-voltage control panel, a balanced combustion fan and a stainless heat exchanger that is pressure-tested before dispatch. Spare glow plugs, fuel pumps and filters are stocked for fast turnaround.
Installation and Operation Best Practices
Mount the heater on a level, rigid bracket away from direct engine heat. Draw combustion air from outside the passenger compartment. Route the exhaust outside, pointing down and away from bodywork, fuel tanks and cabin vents. Use a dedicated battery feed with a fuse within 30 cm of the battery. Prime the fuel line before first start. Annual service — new air filter, new fuel filter and a soot check — keeps output at spec for thousands of hours.
Why a Parking Heater Beats Engine Idling
Idling a diesel engine overnight burns 1.5 to 3 litres of fuel per hour and wears cylinders, rings and turbochargers through cold-start friction. A diesel parking heater burns 0.1 to 0.3 litres per hour, draws roughly 2 A on low, and produces almost no vibration. On a typical eight-hour night it uses around 2 litres of fuel and 15 Ah of battery, compared with 15 to 25 litres idling. Over a winter, that saving pays back the heater many times over, while also meeting anti-idling laws in cities across Europe and North America.
Common Questions and Troubleshooting Tips
If the heater fails to light, check glow plug resistance (0.8 to 1.2 ohms), verify fuel reaches the metering pump, and confirm battery voltage is above 11.5 V. If the heater blows cold air, the heat exchanger is likely choked with soot and needs cleaning. If the control panel freezes, disconnect the battery for five minutes to reset the ECU. Carry a spare glow plug, fuel filter and air filter on long trips; these three spares resolve most roadside issues without a service agent.
References
[4] EN 590: Automotive fuels — Diesel, cold-climate grades and CFPP rating.
[5] European Union Regulation (EU) 2015/1188 on monitoring and reporting of CO2 emissions.
