DIY Stock Tank Hot Tub

IN THIS HOW-TO, WE SHOW YOU HOW TO MAKE YOUR VERY OWN WOOD-FIRED HOT TUB WITH SIMPLE MATERIALS YOU CAN GET RIGHT AT THE HARDWARE STORE. YOU’LL BE UP AND RUNNING IN JUST A COUPLE HOURS FOR ABOUT $200.

illustrated graphic on a small pad with plans for a heating coil and a stock tank to make a hottub

ATTENTION:

HOT WATER CAN CAUSE SCALDING AND EVEN DEATH. BE SURE TO MEASURE THE TEMPERATURE OF THE WATER BEFORE EXPOSING YOURSELF TO IT. IF WATER IS TOO HOT THEN EXTINGUISH FIRE AND LET WATER COOL

SUPPLIES NEEDED

6’ GALVANIZED STOCK TANK

COILED COPPER TUBING
Video Used: 5/8” (the higher the Gauge the faster your tub will heat up).

COPPER JOINING PARTS
Or soldering setup (this step is really up to you, there are 20 different ways to connect your copper tubing to the stock tank both PVC and copper plumbing parts. This video used a series of copper joints, (male /male), washers (metal and rubber).

PLUMBERS TAPE

CAULK

DRILL

METAL DRILL BIT (that is the size of your copper tubing)

METAL FILE

METAL POSTS X2

WIRE

BRICK
(optional but increases efficiency via insulation)

FIREWOOD

WATER SOURCE

TIME

STEPS

1. FIND A SPOT

2. LEVEL AND TAMP

3. INSTALL STOCK TANK

person standing behind a tool with a flat bottom balanced on a small rise of dirt
person in red and black flannel shirt with hands on a large metal tub in an outdoor area

4. DRILL TWO HOLES, ONE HIGH, ONE LOW

5. USE METAL RASP TO CLEAN UP HOLE

6. INSTALL COPPER FITTINGS AND SEAL BOTH SIDES OF HOLES WITH CAULK

7. PLACE COPPER TUBING COIL 4 FEET FROM TANK

8. UNCOIL ENDS AND STRETCH UP MAIN COIL

9. SINK TWO METAL STAKES TO HOLD UP COIL

10. USE WIRE TO SECURE COPPER TO STAKES TO SUPPORT COIL IN A SPRING-LIKE WAY. 

black and white image of hand holding a large coil of silver metal tubing
woman driving metal posts into the ground wrapping copper tubing around them

11. SECURE TOP OF COPPER COIL TO TOP STOCK TANK HOLE AND BOTTOM OF COIL TO BOTTOM HOLE.

12. STACK BRICKS OR ROCKS UP TO INSULATE FIRE PIT (Be sure to leave air holes at the bottom of stack to fuel flames)

13. FILL UP STOCK TANK. CHECK FOR LEAKS

14. COLLECT WOOD

15. LIGHT, STOKE. (water will begin to circulate due to the convectional current in the copper tubing)

woman placing chopped wood next to an aluminum tub by a heating coil apparatus
fire burning in the center of a coil of copper tubing

16. COVER TANK TO INSULATE

17. WAIT A COUPLE HOURS (STIR WATER EVERY ONCE IN A WHILE TO MIX TEMP LAYERS)

18. ENJOY. Know your limits and make sure water isn’t too hot.

woman sitting in a homemade aluminum hottub in a meadow
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