Your caravan’s gas system powers cooking, heating, hot water, and the fridge. A well-maintained system keeps you comfortable and safe on the road, while a neglected one can leave you without essentials or, worse, create dangerous situations. Regular maintenance and safety checks take about 30 minutes and can prevent costly breakdowns hundreds of kilometres from help.
This guide covers the essential maintenance tasks every Big Lapper should know, from monthly visual inspections to annual professional servicing. You’ll learn how to spot problems early, perform basic checks yourself, and know when to call in the professionals.
1. Monthly Visual Inspection
Start with a thorough visual inspection of your entire gas system. This catches obvious problems before they become dangerous or expensive. Check the gas bottles, connections, hoses, and any visible components for damage, corrosion, or wear.
Look for rust or corrosion on bottle valves, fittings, and the regulator body. White powder around brass fittings indicates corrosion. Green residue on copper pipes suggests moisture damage. Any visible damage means the component needs immediate attention.
Check for loose connections by gently wiggling fittings and joints. They should feel solid with no movement. Loose connections allow gas leaks and must be tightened or replaced.
Take photos of your gas system during your first inspection. This baseline helps you spot changes over time that might indicate developing problems.
Examine the gas bottle mounting and securing system. Bottles should sit firmly in their brackets with no movement when you shake them. Check that securing straps or chains are tight and not frayed. Loose bottles create stress on connections and hoses.
2. Pressure Regulator Check
The pressure regulator reduces bottle pressure from 800+ kPa to the 2.75 kPa your appliances need. A faulty regulator affects all gas appliances and creates safety risks. Test it monthly using the lockup test.
Turn off all gas appliances and ensure pilot lights are extinguished. Turn on the gas at the bottle valve and note the regulator gauge reading. The pressure should stabilise at 2.75 kPa within 30 seconds. If it continues rising or won’t reach 2.75 kPa, the regulator needs replacement.
Perform the lockup test by closing the gas bottle valve while watching the gauge. The pressure should hold steady for at least 10 minutes. Any pressure drop indicates a leak somewhere downstream of the regulator.
If the lockup test fails, don’t use gas appliances until you find and fix the leak. This is a serious safety issue that requires immediate attention.
Check the regulator vent hole underneath. This small hole allows the diaphragm to work properly and must stay clear. Use a thin wire to gently clear any debris, but avoid pushing debris further into the regulator.
3. Hose and Fitting Inspection
Gas hoses deteriorate over time from UV exposure, heat, and flexing. Australian conditions are particularly harsh on rubber components. Check every hose from bottle to appliance for cracks, bulging, or hardening.
Run your hands along each hose feeling for soft spots, bulges, or rough patches. Bend the hose gently near fittings where stress cracking typically starts. Any cracks, even hairline ones, mean immediate replacement.
Inspect all threaded connections for cross-threading or damage. Thread damage prevents proper sealing and creates leak paths. Clean threads with a wire brush and apply a small amount of approved thread sealant when reassembling.
Test all connections with soapy water. Mix one part dishwashing liquid with three parts water in a spray bottle. Spray every joint and connection while the gas is turned on. Bubbles indicate leaks that need immediate attention.
Replace gas hoses every five years regardless of their apparent condition. Heat and UV damage occurs from the inside out, making external inspection unreliable for older hoses.
4. Appliance Operation Test
Test each gas appliance monthly to ensure proper operation and safety system function. Start with the easiest: your cooktop and oven. Light each burner and check for steady blue flames. Yellow or orange flames indicate poor combustion that wastes gas and creates carbon monoxide.
Test the gas hot water system by running hot water taps. The unit should light automatically and maintain steady operation. Listen for unusual noises like whistling or rumbling that indicate problems.
Check your gas heating system by cycling it through its full temperature range. Ensure the thermostat responds properly and the unit shuts off cleanly when reaching set temperature.
For three-way fridges running on gas, check that the flame stays lit and burns cleanly. The cooling performance should match electric operation. Poor gas flame affects cooling efficiency and increases running costs.
Keep a log of appliance performance. Note any changes in lighting time, flame colour, or efficiency. Gradual changes often indicate developing problems that are cheaper to fix early.
5. Gas Detector Testing
Your gas detector is the last line of defence against dangerous gas accumulation. Test it monthly using the test button, but also verify it responds to actual gas. Most detectors have a recommended test gas or you can use a small amount of gas from a lighter (without igniting it).
Replace detector batteries annually or when the low battery warning sounds. Mark battery replacement dates in your maintenance log. Some detectors have 10-year sealed batteries that require complete unit replacement.
Clean the detector sensor area monthly with a soft brush or compressed air. Dust and debris reduce sensitivity and can cause false alarms or missed leaks.
Check the detector’s age and replace it according to manufacturer recommendations, typically every 5-7 years. Sensors deteriorate over time and become less reliable.
Never disable or ignore a gas detector alarm. Even if you can’t smell gas, evacuate the caravan and investigate the cause before using any gas appliances.
6. Annual Professional Service
Book professional gas system servicing annually with a qualified gas fitter. They have specialised equipment to perform pressure testing, flow rate checks, and internal component inspection that you can’t do yourself.
The professional service includes testing the entire system under pressure, checking gas flow rates to each appliance, and verifying safety system operation. They’ll also service appliances like hot water systems and heaters that require internal cleaning and adjustment.
Ask for a written report detailing what was checked, any problems found, and recommended maintenance or replacement items. This documentation helps with insurance claims and resale value.
Schedule servicing before major trips, not during them. Finding problems in remote areas limits your repair options and can end your trip early.
Combine your annual gas service with other caravan maintenance like brake and suspension checks. This saves time and often reduces costs through package deals.
Common Mistakes to Avoid
Don’t overtighten gas fittings. Hand tight plus one quarter turn with a spanner is usually sufficient. Overtightening damages threads and can crack brass fittings.
Never use automotive grease or oil on gas fittings. These products can damage seals and create fire hazards. Use only approved gas-safe lubricants and sealants.
Don’t ignore small leaks thinking they’re not dangerous. Any gas leak can accumulate in enclosed spaces and create explosion or asphyxiation risks.
Avoid using worn or damaged tools on gas fittings. Slipping spanners can damage fittings and create leak paths. Invest in quality tools sized correctly for your system.
Don’t skip the soapy water test because you can’t smell gas. LP gas has an added odourant, but it can fade over time or in certain conditions. The soap test is more reliable.
Never attempt major repairs yourself unless you’re a qualified gas fitter. Gas work requires specific training and certification. DIY repairs can create dangerous situations and void insurance coverage.
- Perform monthly visual inspections and pressure tests to catch problems early
- Test all connections with soapy water and never ignore even small leaks
- Replace hoses every five years and gas detectors according to manufacturer recommendations
- Schedule annual professional servicing before major trips, not during them
- Keep detailed maintenance logs to track system condition and identify developing problems
- Never attempt major gas work yourself unless you’re qualified and certified
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