It’s actually pretty easy.

Yes, there’s no thermostat. But here’s the thing: a wood fired soak heats slowly, and that’s exactly what makes it simple to control.

Get the water to a warm bath temperature, around 34-36°, which you can measure using the included floating thermometer. That often takes around 90 minutes with the cover on. Then, pop one last small log on and stop feeding the fire. The heat keeps rising gently over the next hour, giving you a long, comfortable soak before it ever gets too warm.

Want it to climb even slower? Skip that last log.

Too warm for your liking? Add a splash of cold water from the tap.

The trick is just keeping an eye on the fire and the water. Do that, and there are no surprises. Honestly, building the fire and bringing it up to temperature yourself is half the fun!

Got questions about it? Send us a message. We’re always happy to talk you through it 😉

With the cover on, you'll reach a warm bath temperature of around 34 to 38°C in about 90 minutes, and 40°C or more in around 2.5 hours. Times vary a little with the outside temperature and how much wood you feed the fire. The cover makes a big difference, it roughly halves the heat-up time, and it's included. And honestly, the gentle build is part of the experience: light the fire, let it come up while you unwind, then climb in.

Everything you need to fill, light, and soak. No add-ons required.

- 1.8m oval galvanised steel tub, pre-drilled for the coil kit

- Wood fire coil kit (the heating system — gravity-fed, no power, no pump)

- Floating thermometer

- Custom-fit UV-resistant cover

- Step-by-step setup guide

- Ongoing phone support if you get stuck

This product does not include — and does not need — a pump, filter, or plumbing kit. The tub is filled and drained for each use, like an outdoor bath, so the running setup is as simple as a hose, the coil, and the fire.

Yes, as long as you keep an eye on it, which is easy to do. A comfortable soak sits around 36 to 38C, much like a warm bath. You set the temperature yourself using the fire and the included floating thermometer, and you can always add a splash of cold water from the tap if it climbs warmer than you like. As with any hot tub or spa, we recommend soaking at a comfortable temperature rather than a hot one, keeping soaks reasonable in length, and taking extra care with young children, during pregnancy, or if you have a health condition. If in doubt, ease off the fire and let it cool slightly before getting in.

Delivery times depend on current demand and stock availability, and generally range from about 2 to 6 weeks. Delivery is free anywhere in Australia, and once your tub is on its way we'll keep you posted. If you need it by a particular date, get in touch before you order and we'll let you know what's realistic.

The Off-Grid Wood Fired Hot Tub comfortably fits 2 adults. The interior is 1.8m long × 0.61m wide × 0.61m deep — oval (stadium shape) — and holds around 550L when filled to a comfortable bathing depth.

It's designed for couples, solo soaks, or a parent with a child. If you want something a small group can sit in together, look at the round pool tanks (Family Plunge fits 5 adults, Urban Plunge fits 3) — though those run on a pump and filter, not a wood fire, and serve a different use case.

Fire safety and where to put it
The coil burns an open fire while it is running, so treat it exactly like a backyard fire pit or pizza oven.

• Outdoors only, never indoors, in a garage, or under a roofed patio.
• On a non-combustible base only: compacted cracker dust, gravel, concrete, stone pavers, slate or natural earth. Never on a timber or composite deck, artificial turf, or any surface that can burn.
• Keep the coil at least 3m clear of buildings, pergolas, sheds, fences, eaves, vegetation, washing lines and overhanging branches, or further if your council requires a greater distance to a boundary.|
• Never light it on a day of Total Fire Ban or during local fire restrictions. Burning solid fuel on a Total Fire Ban day is an offence. Check your state fire service before lighting.
• Some councils restrict outdoor wood smoke. Check your local rules, especially in built-up areas.
• Burn only dry, seasoned hardwood. Keep a hose or extinguisher within reach. Never leave the fire unattended, and keep children and pets well away from the firebox and chimney. The coil stays hot for at least 30 minutes after the fire is out.

It depends on where you live, so the safest first step is to check with your local council before you set up.

These are fill-and-drain tubs meant for outdoor bath tub use, but because the tub holds more than 300mm of water, pool and spa safety rules can apply, and they vary from state to state and council to council. Some councils require a compliant safety barrier. In some states, a certified lockable child-safe cover may be allowed instead. The only way to know exactly what's needed at your place is to ask your local council.

We recommend fill-and-drain use, and we're always happy to help point you toward the right information for your state. Just get in touch.

Please note: pool and spa safety laws may apply to this product. Consult your local government authority for barrier and approval requirements before installation.

Because this tub is off-grid with no electrical parts, it doesn't need to be earthed by an electrician. The only exception is if you later add a powered pump, or place the tub within 1.25m of a power point or garden light. In that case Australian wiring rules (AS/NZS 3000) require a licensed electrician to bond the steel shell first.

General information only, not legal advice.

Two options:

1. Siphon it out. Run a standard garden hose from inside the tub to a drainage point lower than the tub (a garden bed, gutter, or grate). Start the siphon and gravity does the rest. This is what most customers do.

2. Use the drain plug. The tub has a drain plug at the back. If you site the tub on a base with built-in drainage (a slight slope to a drainage pit, or a paver setup with a gap underneath), you can pull the plug and let it empty.

Refill is straightforward — a standard garden hose to a comfortable bathing depth (~550L for 2 adults) takes 30 minutes.

We leak-test every single tub before it ships, so it's uncommon. But it's worth knowing what happens if it does.

Your tub is genuine farm equipment. These tanks were designed to sit in a paddock and be fixed in a paddock, which is exactly why farmers trust them. Very occasionally the rough and tumble of transport creates a tiny weep at a seam or a fitting.

If that happens, it's typically a five-minute fix. Your order includes a tube of silicone for exactly this. Call us on 0424 661 542 and we'll walk you through it on the spot, you'll be soaking the same day.

Every tub comes in raw galvanised steel as standard, which is the finish most customers choose. It weathers to a soft matte grey and looks better with age.

If you want colour, you can add one of four finishes at checkout:

• Matte White
• Matte Black
• Olive Green
• Terracotta

We apply the colour using Raptor coating, the same ultra-durable finish used on off-road vehicle trays. It's built for harsh Australian conditions and won't chip or fade the way standard paint does. The coating goes on the outside of the tub only. The inside stays bare galvanised steel, which is what keeps the water chemical-free.

Colour is applied before dispatch, so choose it when you order. We can't add it later.

Want a specific Dulux or Colorbond code instead? Call us on 0424 661 542 before you order and we'll tell you what's possible and what it costs.

Want a specific Dulux or Colorbond code instead? Call us on 0424 661 542 before you order and we'll tell you what's possible and what it costs.

Australia-wide, freezing is rarely an issue.

For most of the country (Perth, Sydney, Brisbane, most of VIC and SA): water sits well above freezing year-round and a tub used at least once a week effectively never freezes. With the cover on, water typically loses 15–18°C per day — so even an unused tub stays well above freezing.

For alpine or sub-zero areas, you have three options:
- Drain fully between soaks (the simplest answer).
- Leave only ~125mm (5 inches) of water in the bottom — a small ice volume can't damage the tub.
- Float a partially inflated inner tube or a couple of sealed empty plastic bottles on the surface — they absorb the expansion if the surface ice forms.

If you're in an alpine zone and bathing weekly, draining is still the cleanest approach. If you're using it less often, the reduced-water + flotation method works.

Fire safety and where to put it
The coil burns an open fire while it is running, so treat it exactly like a backyard fire pit or pizza oven.

• Outdoors only, never indoors, in a garage, or under a roofed patio.
• On a non-combustible base only: compacted cracker dust, gravel, concrete, stone pavers, slate or natural earth. Never on a timber or composite deck, artificial turf, or any surface that can burn.
• Keep the coil at least 3m clear of buildings, pergolas, sheds, fences, eaves, vegetation, washing lines and overhanging branches, or further if your council requires a greater distance to a boundary.|
• Never light it on a day of Total Fire Ban or during local fire restrictions. Burning solid fuel on a Total Fire Ban day is an offence. Check your state fire service before lighting.
• Some councils restrict outdoor wood smoke. Check your local rules, especially in built-up areas.
• Burn only dry, seasoned hardwood. Keep a hose or extinguisher within reach. Never leave the fire unattended, and keep children and pets well away from the coil. The coil stays hot for at least 30 minutes after the fire is out.

For ease, use a ash pan. Empty the ash pan after each session for frequent use, or weekly for occasional use.

Cooled ash is safe to compost or scatter as garden fertiliser — it's high in potassium and good for most non-acid-loving plants.

Periodically check the coil and chimney for tar or soot build-up. Both are signs of damp wood or unsuitable fuel — switch to dry, seasoned hardwood and the build-up disappears.

Roughly $0 in ongoing power (it doesn't use any) plus a few dollars per soak in firewood.

A typical session uses about a small armful of dry hardwood — under $10 from a hardware store, free if you have a wood pile. Compared to a powered spa (which can run $150–$300/month just to keep hot), the running cost difference is dramatic.

There's no chemical cost either — because the tub is drained and refilled each use, you're not maintaining sanitiser levels.

We offer a 90-Day Money-Back Guarantee.

If you don't love your hot tub, return it within 90 days of delivery — even if you've already used it — for a full refund of the purchase price. The only condition: you cover the cost of returning the tub to our nearest metro warehouse.

If your order arrives damaged, faulty, or not as described, that's separate — we'll repair, replace, or refund under your Australian Consumer Law rights regardless of timing. Email hello@terratanks.com.au and we'll sort it.

The inside of the tub, where you sit, only ever reaches the water's temperature, so it stays comfortable to lean against. The part that gets hot is the external coil, because that's where the fire burns. Treat it like any open fire: keep clear of the coil while it's lit, and keep children and pets away from that side. The upside of the coil sitting outside the tub is that there's no scorching-hot surface in the water where you're actually sitting.

Yes. Drain it, disconnect the coil kit, and roll the empty tub to its new spot. The coil kit detaches from the tub via two pipe connections — you don't need to dismantle anything else.

Most customers find a permanent spot during their first season and don't move it again, but the tub is genuinely portable if you change your mind, move house, or want to reposition seasonally.