How to Set Up an LPG Water Boiler in Your Catering Van (Fracino Atlantis Mini Gas)
Last updated: June 2026
A constant supply of near-boiling water is what keeps a tea, coffee and food stall moving — but on an off-grid pitch you can’t just plug a kettle into the wall. An LPG water boiler solves that, and setting one up properly takes about twenty minutes.
The Fracino Atlantis Mini Gas is the standard propane water boiler for UK mobile caterers, and it is the only LPG water boiler sold in the UK — every other brand is electric only. It heats a 7-litre tank with propane fed through a 37 mbar regulator, holding water at around 90°C for roughly 150 hot drinks a day. Expect to pay from £1,280, so it earns its place fast on any busy hot-drinks pitch.
In 30 seconds:
- Run it on propane only, through a 37 mbar propane regulator. Never butane.
- Fill the tank with water before you light it. Lighting it dry can damage the boiler.
- Connect a cold-water feed (a pumped fresh-water container off-grid) so the auto-fill keeps the tank topped up.
- Leak-test every propane joint with soapy water before you light anything.
- Set it to about 90°C for tea and coffee, and shut down at the cylinder first.
Still choosing your boiler? Read our best portable water boiler for mobile catering guide first, then come back here to set it up.
Why propane? Propane keeps vaporising down to about −42°C, so it works outdoors in any UK weather. Butane stops working below roughly 2°C, which makes it useless for winter trading. The Atlantis Mini Gas is built and rated for propane.
Why the order matters. Most problems come from skipping a step — lighting before the tank is full, or firing up before a leak-test. Doing the steps in order takes a few extra minutes and removes the two biggest risks.
Honest summary: the single biggest mistake new caterers make is lighting the boiler before it is full of water and before checking the propane joints. Do those two things first, every time, and the rest is straightforward.
Quick specs: Fracino Atlantis Mini Gas
- Fuel: propane (LPG) at 37 mbar — 1,800 W propane burner plus a small 50 W electric element
- Tank: 7 litres of stored hot water
- Output: about 30 litres an hour — roughly 150 hot drinks a day
- Temperature: pre-set to 90°C, adjustable 80–95°C
- Safety: low-water cut-out and high-temperature cut-out built in
- Size: 530 mm high × 310 mm wide × 430 mm deep, slim stainless-steel case
- Fill: auto-fill from a cold-water feed, with a non-drip tap
- Made in: Britain, by Fracino. From £1,280.
The Fracino Atlantis Mini Gas is the only propane water boiler on the UK market, which is why it is the default choice for off-grid tea and coffee traders.
What you’ll need
- Your Atlantis Mini Gas boiler
- A propane cylinder (a 13 kg patio bottle, or a larger 19 kg / 47 kg bottle for a busy day)
- A 37 mbar propane regulator with the correct cylinder connector (usually a POL fitting)
- A current-standard LPG hose with crimped end fittings — see our LPG hose and regulator guide
- A cold-water feed — a fresh-water container with a small pump for off-grid pitches
- A small electrical supply for the controls and auto-fill (a leisure battery and inverter on most vans)
- Two spanners to make the connections snug
- Soapy water in a spray or brush, or leak-detector spray
- A fire blanket within reach
Not sure which cylinder size suits your day’s trading? Our LPG cylinder sizes guide matches bottle size to appliance load.
Step 1: Position the boiler on a level, ventilated surface
Stand the boiler on a stable, level worktop with clear space around it and good airflow. Keep it away from anything that can catch fire, and where you can reach the tap and controls easily.
Why: a level boiler reads its water level correctly and heats evenly. Good airflow clears combustion fumes — burning propane in a closed van risks carbon monoxide, which you cannot smell.
Step 2: Connect the cold-water feed
Connect the boiler’s inlet to your cold-water supply. On an off-grid pitch that means a sealed fresh-water container feeding a small pump, which pushes water up to the boiler. The auto-fill then keeps the 7-litre tank topped up as you draw water off.
Why: the boiler is designed to stay full and re-fill itself. A steady feed means you never run it dry and never wait for a refill mid-service.
Step 3: Connect the propane — cylinder, regulator, hose, boiler
With the cylinder turned off, fit the 37 mbar regulator to the bottle, then run the LPG hose from the regulator to the boiler’s propane inlet. Tighten each joint with two spanners — firm, not forced.
Why: the regulator drops the cylinder’s high pressure to the steady 37 mbar the burner is built for. The wrong pressure gives a weak or roaring flame. Hand-tight joints leak, so always finish with spanners.
Step 4: Fill the tank with water before lighting
Switch on the power and let the auto-fill draw water until the 7-litre tank is full, or fill it manually if your model allows. Open the tap briefly to check water is flowing through. Only move on once the tank is full.
Why: water carries the burner’s heat away from the tank. Lighting a dry or part-full boiler can damage it. The low-water cut-out is a backup — don’t rely on it instead of filling first.
Step 5: Leak-test every propane joint
Open the cylinder valve with the boiler’s propane control still off. Brush soapy water over every joint — cylinder, regulator and boiler inlet. Watch closely: growing bubbles mean a leak. If you see any, turn off the cylinder, tighten or refit, and test again.
Why: this thirty-second check is the most important step. A leak you light becomes a flare-up. Never use a flame to look for a leak — only soapy water or leak-detector spray.
Step 6: Light the burner and bring the water up to temperature
Follow the boiler’s ignition sequence: turn the control to ignition, press and hold to light the pilot, hold for about twenty seconds so the flame-safety sensor warms up, then release and turn to the running setting. The main burner lights and starts heating the tank.
Why: holding the control in keeps propane flowing while the safety sensor heats up. Let go too soon and the sensor shuts the propane off — a safety feature, not a fault. From cold, the 7-litre tank takes a short while to reach temperature.
Step 7: Set the temperature for tea and coffee
Leave the boiler on its pre-set 90°C for most trading. You can adjust it within the 80–95°C range if you need to. At 90°C it holds water hot enough for tea and coffee while topping itself up from the cold feed.
Why: 90°C is the sweet spot for hot drinks — hot enough to brew properly, below a rolling boil so it isn’t wasting propane or spitting. The high-temperature cut-out stops it overheating if anything goes wrong.
Step 8: Shut down safely — cylinder first
To turn off, close the propane cylinder valve first and let the burner die as it uses up the propane in the hose. Then turn the boiler control and the power off. Drain the tank at the end of the day if you’re storing the van in the cold.
Why: shutting the cylinder first clears propane from the hose, so nothing is left under pressure overnight. Draining in winter stops any standing water freezing and splitting the tank.
Common mistakes to avoid
- Lighting before the tank is full. Always fill with water first, every time.
- Skipping the leak-test. Check every joint with soapy water before you light.
- Using butane. It fails in the cold and runs at the wrong pressure. Propane only.
- An old or damaged hose. Replace perished hoses; use crimped fittings, not jubilee clips.
- No ventilation. Always run a propane boiler with airflow to clear fumes.
- Letting the fresh-water container run dry. The auto-fill can only feed what’s in the tank.
- Skipping the annual check. Have the propane system inspected by a Gas Safe registered engineer with the commercial catering qualification (CP44).
Setting up your whole pitch from scratch? Our off-grid mobile catering setup guide covers power, water and propane together.
Frequently asked questions
Can I run a water boiler on butane?
No — use propane only. Butane stops vaporising below about 2°C, so it fails on cold UK trading days, and it runs at 28 mbar instead of propane’s 37 mbar. The Fracino Atlantis Mini Gas is built and rated for propane. Fit a 37 mbar propane regulator and a propane cylinder every time.
Is there an LPG water boiler other than the Fracino Atlantis Mini Gas?
No. As of 2026 the Fracino Atlantis Mini Gas is the only propane water boiler sold in the UK. Other brands such as Buffalo, Burco and Parry are electric only, so they need mains power or a large generator. That makes the Atlantis the default choice for off-grid tea and coffee traders.
Do I need a water connection to use it?
You need a cold-water feed, but not mains plumbing. On an off-grid pitch you feed it from a sealed fresh-water container through a small pump, and the auto-fill keeps the 7-litre tank topped up. Keep an eye on the container level so it never runs dry during service.
How many hot drinks will it make?
About 150 a day. The Atlantis Mini Gas holds 7 litres and delivers roughly 30 litres of hot water an hour, which comfortably covers a steady tea and coffee pitch. For very high-volume events you would run two boilers or pair it with a larger setup.
What temperature should I set it to?
Leave it on the pre-set 90°C for tea and coffee. You can adjust it between 80°C and 95°C if needed. At 90°C the water is hot enough to brew properly but below a rolling boil, so it isn’t wasting propane or spitting from the tap.
Why won’t the burner stay lit when I release the control?
The flame-safety sensor probably hasn’t warmed up yet. Hold the control in for about twenty seconds while the pilot burns, then release. If it still goes out, the pilot or sensor may need cleaning. This safety part shuts the propane off whenever it cannot sense a flame.
Does the boiler need electricity as well as propane?
It needs a small electrical supply for its controls and auto-fill, alongside the propane that heats the water. A leisure battery and inverter cover this on most vans. The heating is done by the 1,800 W propane burner, so you are not relying on a big power source the way an electric boiler would need.
Do I need a Gas Safe engineer to use it?
You can connect and light it yourself for daily trading. However, the propane system should be inspected by a Gas Safe registered engineer holding the commercial catering qualification (CP44), typically once a year. Event organisers and councils commonly ask for a current gas safety certificate before they let you trade.
Ready to buy? See the Fracino Atlantis Mini Gas water boiler — the UK’s only propane water boiler, built for off-grid trading.