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Price:$499.00

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Wood fire heated hot tub coil kit (1 inch coil)

ColdFireWorkshop  
Arrives soon! Get it by Jun 13-15 if you order today
Jun 13-15

Returns & exchanges accepted

You can only make an offer when buying a single item

Star Seller. This seller consistently earned 5-star reviews, shipped on time, and replied quickly to any messages they received.

Included are all the parts required to convert a stock tank into a wood fired hot tub. Initial heating time will be approximately 3-5 hours, but could be longer depending on starting water temperature and size of tank. The stock tank or the chiminea (shown in the picture) are not included in this listing. You could purchase a steel or plastic tank at almost any hardware or agricultural store. I highly recommend insulating the tank as it will greatly improve heating times and temperature retention. I am happy to provide advice, including specific product links, on how to best insulate the tank, and also give it a more aesthetically pleasing appearance.

With this kit, you receive:

-a 20 foot long stainless steel coil (OD 1") with couplers and 12 inch threaded steel extensions
- two 1 inch diameter flex hoses
- two 1 in fittings to make a water tight connection to the tank.
-two 3/4 in plugs (allowing you to disconnect the coil kit without draining the tank)
- 1-1/4 inch steel hole saw bit
- a thermometer

All you need to do is drill your holes, attach the kit, start a fire, and in a few hours enjoy your soak! Once your fire is going, the water will circulate based on a thermodynamics principal called thermosyphon, so no motor is necessary!

View a demonstration video here: https://youtube.com/shorts/x4IyyJ5mJSE?si=ZB_kMFA4Nd7B52eb

See my video with a tip on how to situate the coil in a way that avoids a possible air lock: https://youtu.be/GrzRsPVI7_k?si=0dTgO8IeO9kBxspY

Learn more about this item
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  • Order today to get by Jun 13-15
  • Returns & exchanges accepted within 30 days
  • Cost to ship: $35.47
  • Ships from: Castle Rock, CO

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ColdFireWorkshop
ColdFireWorkshop ·

Denver, Colorado

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience. 5.0
·
54 sales
·
1 year on Etsy

Typically responds within a few hours

Typically responds within a few hours

Smooth shipping Has a history of shipping on time with tracking.

Speedy replies Has a history of replying to messages quickly.

Rave reviews Average review rating is 4.8 or higher.

Reviews for this item

Buyer highlights, summarized by AI: Fast shipping · Great quality

5.0

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience.

(4 reviews)

5.0 Item quality
5.0 Shipping
5.0 Customer service
100% Buyers recommend
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5 out of 5 stars 5 This item

Rachel Apr 1, 2026

Super easy to install, well made, fast shipping, seller quick and available to answer all questions. Would recommend heating with a cover on. A relaxing treat in nature. Highly recommended

Rachel Apr 1, 2026

5 out of 5 stars 5 This item

Levi Mar 16, 2026

fast shiping and high quality unit. Its fantastic to use on cool nights, and if you can set it up with a good view of the stars it's even better. The hot water tends to stay at the top of the tank, so plan on giving it a good mix before you soak. If you get one, it will take about 4 or 5 hrs to heat a 150 gallon stock tank. Be prepared to build a biger fire if you want it hot faster.

Levi Mar 16, 2026

5 out of 5 stars 5 This item

Joe Mar 6, 2026

Shipped quickly. Parts look good

Joe Mar 6, 2026

5 out of 5 stars 5 This item

Kasey Dec 9, 2025

Amazing customer service, and excited to build with son.

Kasey Dec 9, 2025

Disclaimer: Sellers are responsible for following all applicable laws and regulations, including third party testing, labeling. Always read labels, warnings, directions, and other information provided with the product before using. Dressers, clothing storage units, and other similar top-heavy furniture can tip over and pose a threat of serious injury or death to children if not anchored. For more information on preventing tip-over incidents, please visit https://www.anchorit.gov/. If you have any questions or concerns about a product or its suitability for your home, please message the seller. See Etsy's Terms of Use for more information.