Motorhome Drain Down
How to Drain Your Motorhome for Winter: Step-by-Step Guide

How to Drain Your Motorhome for Winter: Step-by-Step Guide

As the colder months approach, it’s crucial to drain your motorhome for winter to protect its water system from freezing and prevent costly damage. Winterizing your motorhome properly ensures that when spring arrives, you can get back on the road with ease.

In this guide, we’ll walk you through the essential steps to winterize your motorhome and prepare it for storage. Whether you own a campervan, motorhome, or caravan, following these steps will keep your vehicle in top condition during the winter months.

Why You Need to Drain Your Motorhome for Winter

Failing to properly drain down your motorhome can lead to:

  • Frozen Pipes: Water expands when it freezes, which can cause pipes and fittings to crack.
  • Damaged Water Pump: Residual water in the pump can freeze, leading to costly repairs.
  • Mould & Mildew: Stagnant water in the system can create bacteria, mold, and unpleasant odors.

Draining your motorhome ensures that these issues don’t arise while your vehicle is in storage.

Step-by-Step Guide to Draining Your Motorhome for Winter

Step 1: Empty the Fresh Water Tank

Start by draining your fresh water tank completely:

  • Locate the fresh water drain valve (usually found underneath the motorhome).
  • Open the valve and allow all water to drain out.
  • Run the taps to remove any remaining water from the pipes.

Step 2: Drain the Waste Water Tank

Your waste water tank (grey water) should also be emptied:

  • Park over a designated drain area or an appropriate disposal point.
  • Open the waste tank valve and allow the water to fully drain.
  • Flush the system with clean water to remove any debris or grease build-up.

Step 3: Drain the Toilet System

The toilet cassette and flush system must be drained to prevent freezing:

  • Empty the cassette toilet at an appropriate disposal point.
  • Flush the system with clean water to remove any residue.
  • Add a small amount of antifreeze to prevent freezing (check the manufacturer’s recommendations).

Step 4: Drain the Hot Water System

The boiler and hot water system must be completely drained:

  • Turn off the water heater and allow it to cool.
  • Locate the drain plug or release valve and empty all water.
  • Leave the valve open to prevent pressure build-up.

Step 5: Open All Taps & Remove Residual Water

To ensure no water is left in the pipes:

  • Open all taps (hot and cold) including the shower.
  • Leave taps open to allow any trapped water to escape.
  • If possible, use an air compressor to blow out any remaining water from the pipes.

Step 6: Protect the Pipes with Antifreeze (Optional)

Adding non-toxic motorhome antifreeze can offer extra protection:

  • Pour antifreeze into the drains and toilet.
  • Run a small amount through the taps to coat the pipes.
  • Use only RV-safe antifreeze designed for water systems.

Additional Winter Storage Tips for Your Motorhome

Besides draining the water system, there are other steps you should take to protect your motorhome:

1. Disconnect the Battery

To prevent the battery from draining over winter:

  • Disconnect the battery and store it in a dry, warm place.
  • If leaving it in the motorhome, use a trickle charger to maintain power.

2. Ventilate the Interior

Prevent dampness and mold by allowing air circulation:

  • Leave cupboard doors and drawers slightly open.
  • Use moisture absorbers to reduce condensation.
  • Ensure air vents are not blocked.

3. Protect the Exterior

Shield your motorhome from harsh winter weather:

  • Wash and wax the exterior to protect against corrosion.
  • Cover vents and exhaust pipes to prevent pests from entering.
  • Use a breathable motorhome cover if storing outdoors.

4. Check Tyres & Brakes

To avoid flat spots on the tyres:

  • Inflate tyres to the recommended pressure.
  • Move the motorhome slightly every few weeks if possible.
  • Engage the handbrake periodically to prevent it from seizing.

When to Drain Your Motorhome for Winter

It’s best to winterize your motorhome before the first frost. In the UK, this usually means:

  • Late October to early November for most regions.
  • Earlier if temperatures are expected to drop below freezing.

Even if you plan to use your motorhome occasionally in winter, draining the water system between trips is still recommended.

Final Thoughts: Keep Your Motorhome Safe This Winter

Draining your motorhome properly is an essential step in winter storage. By following these steps, you’ll protect your vehicle from costly damage and ensure a smooth start when spring arrives.

Taking the time to winterize your motorhome now will save you from headaches and expensive repairs later. Follow this guide, and your campervan will be ready to hit the road again when the weather warms up!

FAQs

  • How often should I drain my motorhome? At the end of the season or before freezing temperatures arrive.
  • Do I need to use antifreeze? It’s optional but recommended for extra protection in extreme cold.
  • Can I leave my motorhome plugged in over winter? If indoors, yes. If stored outside, disconnect the battery.
  • Should I keep my water system open? Yes, leave taps open to prevent pressure build-up.

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