Campervan Easter prep the two systems that fail first

Easter is the traditional 'shakedown' cruise for the UK campervan community. However, after a long, damp British winter, many owners find their first night away ruined by two specific systems that are prone to failure when left idle: the 12V electrical setup and the fresh water plumbing. Whether you are in a bespoke Vanworx or Onyx Vans conversion, or a factory Volkswagen California, these maintenance steps are non-negotiable for the new season.

1. The Leisure Battery: The Heart of Your Off-Grid Comfort

If your leisure battery has been sitting partially discharged over winter, its capacity may have significantly dropped due to sulphation. When a battery fails, LED lights flicker, water pumps pulse unevenly, and diesel heater fans may fail to start due to the initial voltage drop required for the glow plug. The National Caravan Council (NCC) provides a Verified Battery List to help owners identify products suitable for their specific energy needs, which is a useful resource when considering a replacement.

How to Prep Your Electrics:

• Voltage Check: A healthy, fully charged lead-acid battery should read around 12.7V to 12.8V. If it drops below 12V quickly under load, it likely needs replacing.
• Terminal Care: Check for white powdery corrosion on terminals. Clean them with a wire brush and apply a thin layer of petroleum jelly to prevent further oxidation, ensuring a secure connection.
• The 4-Hour Test: Disconnect from the Electric Hook-Up (EHU) and run your usual appliances for four hours. If the voltage plunges below 12.2V, the battery is likely reaching the end of its life.
• Safety Standards: Electrical installations in leisure vehicles are subject to specific safety standards. If you are unsure about your current setup, use our Campervan Conversion Checker to evaluate the installation.

If your battery is over 4 years old, you might consider upgrading to a LiFePO4 (Lithium) system, which is becoming standard in premium Kaktus Adventure Vans or high-end fixed bed campervans. These systems offer greater depth of discharge and are often found in modern campervan layouts designed for off-grid use.

2. The Water System: Leaks and Hygiene

Residual water left in the lines over winter can freeze, expanding and cracking plastic elbow joints or the delicate internal housings of pumps. Even if the hardware is intact, stagnant water can harbour biofilm and bacteria. The NCC warns campervan users against using portable gas heaters indoors due to safety risks, and similar caution should be applied to water system maintenance to ensure a safe environment.

How to Prep Your Plumbing:

• The Pressure Test: Fill your fresh tank and run every tap until the air is purged. Turn the taps off and wait. If the pump 'cycles' (turns on briefly) every few minutes without a tap being open, you have a pressure leak.
• Inspect the 'Hidden' Spots: Check under the sink and near the water heater. A small drip during an Easter frost can lead to a soaked floorboard and mould.
• Sterilisation: Use a dedicated tank cleaner rather than domestic bleach, as bleach can degrade seals in your pump and damage stainless steel components.
• Boiler Check: Ensure your frost protection valve has been reset, or your fresh water will simply dump straight onto the floor.

3. Roadworthiness and Tyre Safety

Under GOV.UK guidelines, you are legally responsible for ensuring your vehicle is roadworthy every time you drive. A current MOT does not guarantee safety if the vehicle has been idle for months. The Highway Code and GOV.UK regulations state that you can be fined up to £2,500, be banned from driving, and get 3 penalty points for driving a vehicle in a dangerous condition.

• Tyre Condition: TyreSafe.org notes that on average over the last five years, 163 people are killed or seriously injured in incidents related to ‘defective tyres’. The 2025 figure of 201 tyre-related KSIs is especially alarming, representing a 19% year-on-year increase. Check for 'flat spots' or sidewall cracking caused by UV exposure and cold.
• Tread Depth: For cars, light vans, and light trailers, the legal minimum tread depth is 1.6mm. This tread must be present across the middle three-quarters and around the entire circumference of the tyre.
• Maintenance Checks: Your vehicle's handbook will provide specific intervals for checking engine oil, water levels in the radiator, brake fluid, and the battery.

If you have added heavy equipment like bike racks or solar panels over the winter, use our Motorhome Weight Checker to ensure you haven't exceeded your vehicle's legal weight limit. Overloading can affect braking performance and tyre wear, increasing the risk of a safety failure.

Easter Readiness Checklist

• [ ] 12V Load Test: Run the system away from EHU for 4 hours to verify capacity.
• [ ] Tyre Inspection: Check pressures and look for sidewall cracking. Ensure tread is at least 1.6mm across the middle three-quarters.
• [ ] Water Flush: Sterilise the fresh tank and flush through at least 20L of fresh water.
• [ ] Fluid Levels: Check engine oil, coolant, and brake fluid levels as per your vehicle handbook.
• [ ] Lights and Mirrors: Ensure all external lights are working and mirrors are clean and secure before every journey.
• [ ] Brake Check: Test that the brakes are working correctly before setting off on your trip.

Fixing these mechanical essentials now ensures you can focus on the views later. If you find your current setup is no longer fit for purpose, you can browse used campervans to find a model with a more robust winter specification from reputable dealers. You may also want to explore different campervan layouts to see if a different configuration better suits your travel style for the 2026 season.

Frequently Asked Questions

Why does my pump keep running when the taps are off?

This usually indicates a leak or a failure in the pressure switch. Check all visible joints first. If no leak is found, the internal diaphragm in the pump may have perished or a non-return valve is stuck open due to limescale. This is a common issue after winter storage if the system was not fully drained.

Can I jump-start my campervan from the leisure battery?

Generally, no. Leisure batteries are designed for 'deep cycle' slow release, not the high-cranking amps (CCA) required to start an engine. Attempting this can damage the internal plates of the leisure battery and blow high-amp fuses. Always use the vehicle's starter battery for engine ignition.

How do I know if my water heater is damaged?

If you see water leaking from the external flue vent or from underneath the vehicle when the pump is on, the internal tank may have split due to frost. This is a common issue if the system wasn't fully drained in November. Check the frost protection valve is closed before filling the system.

What is the legal penalty for driving an unroadworthy campervan?

According to GOV.UK, you can be fined up to £2,500, be banned from driving, and receive 3 penalty points for driving a vehicle in a dangerous condition. It is the driver's responsibility to ensure the vehicle is safe, regardless of its MOT status.

How often should I check my tyre pressures?

You should check your tyre pressures every time you drive, as recommended by GOV.UK. Cold weather can cause pressures to drop, and tyres that have been stationary for long periods may develop flat spots or lose pressure more rapidly.

What is the legal tread depth for a campervan?

For light vans and light trailers, the legal minimum tread depth is 1.6mm. This must be across the middle three-quarters of the tread and around the entire circumference. Large vehicles and motorcycles have different requirements, typically 1mm.

Can I use portable gas heaters in my campervan?

The NCC warns campervan users not to use portable gas heaters indoors. These devices can pose significant safety risks, including carbon monoxide poisoning and fire hazards, especially in the confined space of a leisure vehicle.