What Size Gas Bottle Do You Need?

Most Australian caravans run twin 9kg bottles on the A-frame at the front. That’s the default for good reason: a 9kg bottle is the standard swap size, so you can exchange an empty one at any servo, hardware store, or caravan park across the country. You’ll pay around $28 to $35 for a swap, or roughly $22 to $28 for a straight refill if you find a depot that does it.

How long a 9kg bottle lasts depends entirely on what you’re running. A three-way fridge left on gas full-time will chew through a bottle in around 10 to 14 days. Add a gas hot water system and a cooktop and you might get 7 to 10 days. If you’re only cooking and running a gas hot water service, a single 9kg bottle can stretch to three or four weeks.

Twin 9kg bottles with an auto-changeover regulator is the sweet spot for full-timers. You get roughly a month of buffer between refills and you’re never caught short in the middle of dinner.

Steel vs Composite Bottles

Steel bottles are the workhorse. They’re cheap (around $70 to $90 for a new 9kg), rugged, and every swap service in the country stocks them. The downsides are weight (a full 9kg steel bottle weighs about 16kg all up) and rust if you don’t look after them. On a coastal lap, steel bottles left exposed will start to surface-rust within a year or two.

Composite bottles (the translucent ones from brands like Viking and Kovea) are lighter by around 3kg per bottle, won’t rust, and let you see exactly how much gas is left. They cost more (around $150 to $190) and here’s the catch: you generally can’t swap them. You have to get them refilled, and not every depot will fill a composite bottle. On remote runs that becomes a real headache.

For most Big Lappers, steel wins on practicality. The swap network is unbeatable when you’re a long way from anywhere. Composite makes sense if weight on your A-frame is critical or you’re running a rig where every kilo counts.

Regulators: What Actually Matters

The regulator drops the high pressure from the bottle down to the low, steady pressure your appliances need. In Australia that’s 2.75 kPa. A cheap, worn, or corroded regulator is the single most common cause of gas appliances misbehaving: a fridge that won’t get cold, a stove with weak flames, a hot water heater that keeps cutting out.

Auto-Changeover Regulators

This is the upgrade worth making. An auto-changeover regulator connects to both bottles at once and automatically switches to the second bottle when the first runs empty. A little indicator turns from green to red so you know it’s time to refill the empty one. You never lose gas mid-cook and you never have to crawl out at 6am to swap bottles by hand. For a twin-bottle caravan, this is the setup we’d fit every time.

Single-Stage vs Two-Stage

For a caravan, a single well-made regulator does the job. Where people get caught out is age. Regulators have a service life of around 10 years, and the diaphragm inside degrades whether you use it or not. If your van came with a regulator and you don’t know how old it is, replace it. It’s a $60 to $150 part that prevents a long list of frustrating faults.

Fittings, Hoses & Accessories

The bits between the bottle and the appliance matter more than most people think. Australian gas fittings use a left-hand thread POL connection or, on newer setups, an ACME quick-connect. Get the wrong fitting and it simply won’t connect, or worse, it’ll connect but leak.

Pigtail hoses (the short hoses linking bottles to the regulator) perish over time, especially in UV and heat. Cracked, hard, or sticky hoses need replacing. Budget around $25 to $45 per pigtail. Always buy Australian-certified hoses with the AGA approval mark, not cheap imports of unknown spec.

Other fittings worth having on hand: a POL to bayonet adaptor if you want to run a portable BBQ off your main bottle, a spanner sized for POL fittings, and a spray bottle of soapy water for leak testing.

What to Look For Before You Buy

Our Top Picks

Gas Safety & the Rules

Gas is safe when it’s installed and maintained properly, and a serious hazard when it isn’t. Any permanent gas installation in a caravan (regulator, fixed lines, appliance connections) must be done and certified by a licensed gas fitter. This isn’t optional. It affects your insurance and your registration.

Test for leaks whenever you connect a bottle or replace a fitting. Brush soapy water over every joint with the gas on and watch for bubbles. If it bubbles, turn the gas off and fix it before you go anywhere.

The post The Best Gas Bottles, Regulators & Fittings appeared first on Big Lap Bible.

This guide covers what bottle sizes actually make sense on the road, which regulators are worth buying, and the fittings you need to keep everything legal and leak-free.

What Gas Bottle Size Do You Need?

Australian LPG bottles for caravans come in a few standard sizes. The three you’ll actually deal with are 4kg, 4.5kg and 9kg. The 8.5kg and 9kg bottles are the same physical size in practice, and 9kg is the one you’ll see on almost every caravan A-frame.

The best setup for a big lap is two 9kg bottles. That’s roughly 18kg of gas, which for a couple cooking daily and running gas hot water lasts around eight to twelve weeks. When one empties, an automatic changeover regulator switches to the second, giving you time to refill without ever running dry.

If you also run a three-way fridge on gas or use gas heating in the cold country, plan on refilling more often. A three-way fridge alone can chew through a 9kg bottle in about three weeks.

Steel vs Composite Bottles

Standard steel bottles are what most caravans come with, and for good reason. They’re cheap, tough, and every swap service and servo will refill or exchange them without question.

Composite bottles (the translucent ones from brands like Viking) are lighter by around 40% and let you see the gas level. That’s a real advantage on the A-frame where every kilo of ball weight counts. The downsides: they cost two to three times more upfront, and not every regional servo will refill them because some staff aren’t confident handling them. Swap-and-go services generally only handle steel bottles.

Which should you buy?

For most big lappers, stick with steel 9kg bottles. They’re bulletproof, universally accepted, and cheap to replace if one gets damaged. Composite is worth the premium only if you’re weight-obsessed (light camper trailers, weight-limited A-frames) and you’re happy to plan refills around bigger towns.

Regulators: Which Type to Buy

The regulator drops the high pressure in the bottle down to the low pressure your appliances need (2.75 kPa in Australia). There are two types worth knowing.

Single-stage / single-bottle regulators

These connect one bottle to your system. They’re cheap and simple, but when the bottle runs out, everything stops until you swap it over. Fine for a camper trailer with one bottle, frustrating on a caravan.

Automatic changeover regulators

These connect two bottles at once. When the first empties, the regulator automatically switches to the second and a small indicator changes from green to red. You keep cooking and showering without interruption, then refill the empty bottle whenever it’s convenient. For anyone doing a big lap, this is the setup to have.

Our Top Bottle & Regulator Picks

Fittings, Hoses & Adaptors

Australia uses two main bottle connection types. Knowing which one you have saves a lot of grief.

POL vs ACME (Type 21)

POL fittings are the older left-hand-thread connection, tightened with a spanner. Reliable but fiddly. ACME (Type 21) is the newer hand-tightened connection with a built-in safety feature that shuts off gas flow if there’s no appliance connected. Most new bottles and regulators use ACME. If your regulator and bottle don’t match, you’ll need an adaptor.

Pigtail hoses

The short flexible hoses connecting each bottle to the regulator are called pigtails. They perish over time and are a common leak point. Replace them every few years, and always carry a spare. A cracked pigtail in a remote spot means no gas until you find a replacement.

Refilling and Swapping on the Road

You’ve got two ways to top up gas on a big lap.

Refilling is where a servo or gas depot pumps LPG into your own bottle. It’s cheaper (you only pay for the gas) and you keep your own bottle, but it’s only available where they have a refill pump and staff qualified to operate it. Many outback servos still do this.

Swap-and-go exchanges your empty bottle for a full one at supermarkets, hardware stores and servos. It’s convenient and available almost everywhere, but you pay a premium and you might hand over a near-full bottle for a slightly older one. Only works with standard steel bottles.

The smart approach: refill when you can (cheaper and you keep your good bottles), and use swap-and-go as backup when refilling isn’t available. With an auto changeover regulator you’re never in a rush, so you can wait for a cheaper refill rather than paying swap prices out of desperation.

Safety, Compliance & Gas Checks

Gas is the one system on your rig where cutting corners can end very badly. A few rules keep you safe and legal.

• Gas certificate: Many caravan parks and all registration renewals in some states require a current gas compliance certificate. A licensed gas fitter checks your system every few years.
• Only licensed fitters modify gas systems: You can swap bottles and replace pigtails yourself, but any changes to fixed gas lines or appliances must be done by a licensed gas fitter.
• Turn bottles off when towing: Shut the bottle valves before driving. A three-way fridge should never run on gas while you’re moving with a full tank of fuel.
• Check for leaks regularly: Soapy water on every connection after each bottle change takes 30 seconds and could save your life.

For how gas ties into the rest of your caravan setup, our appliances and hot water guides go deeper on the systems your gas actually runs.

The post The Best Gas Bottles, Regulators & Fittings appeared first on Big Lap Bible.

Here are the things families actually need when travelling long-term with kids, based on what works on the road rather than what looks good in a catalogue.

1. Screens and offline entertainment

Anyone who tells you to travel screen-free with kids for a year hasn’t done it. On long driving legs across the Nullarbor or up the Stuart Highway, screens are the single best tool you have. The key is loading them up before you leave mobile coverage, because you’ll spend plenty of days with no signal at all.

Download movies, shows, and audiobooks onto tablets while you have decent internet. A cheap tablet each avoids the endless “it’s my turn” arguments. Pair them with kids’ headphones so the front seat stays sane, and pack a decent power bank so a flat battery doesn’t ruin a six-hour drive.

Balance screens with old-school options. Card games, travel-sized board games, sticker books, and colouring keep hands busy at camp when you’d rather they weren’t glued to a device. Magnetic games are worth the extra dollars because pieces don’t scatter across the van floor at the first corrugation.

2. A workable schooling setup

If your kids are school-aged, distance education or homeschooling comes on the trip with you. You need a dedicated spot to work, a way to store books and materials, and enough internet to submit work and join the occasional online lesson.

A folding table and a couple of camp chairs create a schooling station outside when the weather’s good. Inside, the van’s dinette usually doubles as the classroom. Keep each child’s workbooks in a labelled zip folder or storage tub so mornings don’t start with a hunt for the maths book.

Internet is the sticking point. A phone plan with a generous data allowance and a signal booster will cover most schooling needs, but if you’re relying on daily uploads, look into a dedicated data setup so schoolwork doesn’t eat your entertainment data.

3. Sleeping arrangements that hold up

Everyone sleeps better when the beds are sorted. Bunk vans are the obvious choice for families, but plenty of people make it work with a rooftop tent, a swag for older kids, or a fold-out setup in the annexe.

Whatever the configuration, invest in decent bedding. Kids feel the cold more than adults, and a night in the Flinders Ranges in July drops to near zero. Warm sleeping bags rated to at least 0°C, a spare blanket each, and a small nightlight go a long way. Blackout options matter too, because caravan park lights and early sunrises will have little ones up at 5am otherwise.

4. Outdoor and downtime gear

Kids need to burn energy after a day in the car. The families who cope best are the ones who can turn any camp into a playground. Scooters and bikes are the top pick here, because most caravan parks and free camps have space for kids to ride, and it wears them out before dinner.

Round it out with a footy or soccer ball, a bucket and spade for beach camps, a kite, and fishing rods if you’re heading up the coast. A cheap inflatable pool is a lifesaver through the top end in the dry season when it hits 35°C by mid-morning.

5. Storage and organisation

Space is the enemy in a van full of kids. Every toy, book, and shoe has to have a home or the whole place turns to chaos within a week. Collapsible storage tubs, hanging shoe organisers on cupboard doors, and mesh bags for toys keep things findable.

Give each child their own tub or drawer for clothes and personal bits. It teaches them to manage their own gear and stops the endless “where’s my jumper” question. Label everything, because two kids’ identical drink bottles will otherwise cause daily disputes.

6. Safety and first aid

You’ll be a long way from a hospital more often than not, so a proper first aid kit is non-negotiable. Stock it for kids specifically: children’s paracetamol and ibuprofen, a thermometer, plenty of bandaids, antiseptic, rehydration sachets, and any prescription medication with enough supply to cover remote stretches.

Sun protection is a daily need. High-SPF sunscreen, broad-brimmed hats, rashies, and insect repellent should live somewhere easy to grab. Australian sun is brutal, and a sunburnt toddler makes for a miserable few days.

7. Food, snacks, and mealtime kit

Hungry kids are grumpy kids, and grumpy kids in a moving vehicle are a special kind of hard. Keep a stash of non-perishable snacks within reach of the back seat: muesli bars, dried fruit, crackers, and refillable drink bottles.

For meals, unbreakable plates and cups matter. Kids drop things, and glass or ceramic won’t survive the corrugations anyway. A set of stackable melamine or enamel dishes handles daily use and packs down small. A thermos flask for warm drinks and a small cooler for snacks on driving days both earn their keep.

8. Keeping the peace on driving days

Long days behind the wheel are where families come unstuck. Break up the drive with regular stops, ideally at playgrounds, beaches, or roadhouses where kids can run around. Aim for a stop every couple of hours rather than pushing through.

Keep an activity bag packed and rotate what’s in it so things stay fresh. Sticker books, a magna doodle, small figurines, and a few surprise items you bring out only on the biggest driving days give you something to reach for when the whining starts. Travel games like “spot the roadtrain” or the number plate game cost nothing and pass the time.

The post X Things You Need When Travelling With Kids appeared first on Big Lap Bible.