RV Winterization Essentials

What goes into an RV winterization kit?

A complete RV winterization setup includes RV antifreeze (non-toxic propylene glycol), a winterizing hand pump or water pump converter kit, a blowout plug for compressed-air purging, and a clear hose for siphoning antifreeze through the freshwater system. Many owners also add water heater bypass valves and a fresh tank flush wand. See the full RV winterizing kits collection for pre-packaged options that cover most rigs in one purchase.

How much RV antifreeze do I need to winterize my camper?

Plan on 2 to 3 gallons for most travel trailers and small Class C rigs, and 3 to 4 gallons for fifth wheels or Class A motorhomes with longer plumbing runs. If you bypass the water heater (a 6 or 10-gallon tank), you save roughly that volume of antifreeze. For owners with larger systems, check the 10 gallon RV water heater collection for the bypass kits that make this step quicker.

Do I need a pump to winterize my RV, or can I use the onboard pump?

You can use either. A dedicated hand pump or a water pump converter kit pulls antifreeze directly from the jug through a siphon hose, bypassing the freshwater tank entirely. Using the onboard 12V pump works too, but you have to pour antifreeze into the freshwater tank first, which wastes fluid and leaves residue. The converter kit method is the cleaner approach for most owners winterizing annually.

What hose should I use for winterizing an RV?

Use a clear, food-grade vinyl siphon hose (typically 3/8 inch ID) so you can see antifreeze flowing through the line. Clear hose lets you confirm the system is fully charged at each fixture, kitchen tap, bath sink, shower, toilet, and outside shower, before you stop pumping. Avoid garden hose for this job; the wall material is not rated for the pump suction and can collapse.

When should I winterize my RV?

Winterize before the first hard freeze in your area, generally when overnight lows drop below 32°F for several nights in a row. In northern states that means late October to mid-November; in milder climates, December is often fine. If you store the RV outside without heated wet bays, do not wait, a single freeze can split a fitting or crack the water heater tank.

Can I winterize my RV without using antifreeze?

Yes, the compressed-air blowout method clears all water from the lines using a blowout plug and a shop compressor set to 30-40 PSI. It works well for short storage periods or mild climates but leaves traps and the water heater tank vulnerable to residual moisture. Most owners in freeze-prone regions use the blowout method first, then follow with antifreeze through P-traps and the water pump for full protection.