Nice video. This concept and design has been around for years. My thoughts/comments are: 1) If you're going through the whole process of making forms and pouring concrete, just make 1 form and make it for the entire size of the tank. Better stability, less chance of the pads coming through bottom of the tank. That's how stock tanks are designed to work. 2) For the heater, build and actual fireplace around your copper pipe and increase the number of coils. That will get your temperatures up and more constant. 3) To retain heat, wrap the tank in insulation and make a decorative outer wrap. Good information tho! 😁😁😁😁

Can't help but chuckle a little of how this reminds me of Looney Tunes where they'd lure someone in thinking it was a hot tub and really be making them into a stew. haha. Looks relaxing! And also looks good for ice baths.

I completed this project today just as you explained. It is currently 28 degrees so it is taking me a bit longer to heat up. I did put a cover on and tarp to contain some heat. Great video. I am an arborist and own and operate a tree service so I have plenty of wood to burn. I will definitely enjoy a hot tub when I'm at 10,000 feet in my off grid cabin. Thanks for sharing the great info.

Can't wait to play with this idea. Been wanting to make and outdoor hot tub for a while. Thanks Ben.

This was pretty well thought out. One serious thing though, because of electrolysis between dissimilar metals there can eventually be corrosion between the copper tubing and steel bars. If you use stainless steel instead for the steel bars it will be ok.

Yeah very nice. I've been wanting to do one of these for about 7 years now. Never got around to it. I'm glad to see it tried and tested and successful. I have been wanting to make the same thing for my pool, to begin and extend the season here in New England.

I built my own also and used boiler tube and enclosed the heating coils in a large piece of pipe. It heated fast and after it got hot it took very little fire to keep it warm. Good job!

the stock tanks come with a built in drain and plug that a hose can screw into. nice for watering the garden after a long soak.

Quick suggestions. Change the steel/iron support bars to copper if you are going to leave it outside. The dissimilar metals will start corroding much faster then if they are the same metal. The other solution is wrap the copper tubing around something that is being heated by the fire. This will allow much better heat transfer into the water so you can wrap more more turns and have more hot water. Great video and concept.

I've always wanted an outside tub...ever since the FALL GUY tv series! !!!love it man 👍👍👍

Great idea. Add a check valve to the bottom side of the pipe. This will help when pressure is built up and push out the hot water to the top. Don't know if they make a cooper check valve. But could use a regular pvc bc the heat isn't much on the intake side. Excellent vid👍🏽👍🏽

Super well done!! A huge amount of heat loss is from the ground/concrete/sand, put some foam insulation under it to keep it warm longer and less fuel to hear it.

You have such a talent! Loved the creativity of this project. Big fan!

Man I could really use one of those right now. This would be great after long hours of work.

my grandpa had something similar in his backyard and always wanted to recreate it. thank you so much.

Dude great idea, I feel justified because I did similar project.. I have no neighbors so I bathe outside all the time!.. I made a tighter heat-riser coil so it would fit into a stovepipe, mounted on a stove made from a propane cylinder.. tempted to plumb/heat my house same way!.. A plus with using a little stove is that you have control of your fire/coals.. Nice!

Awesome project. It's a good thing you have that tall fence or your neighbors would think you're crazy lol

Been using one of those tanks for several years, but I just set it up on rocks and build a fire underneath it. After all it's a metal tank. But I do have to rake the fire out before getting in and then have a limited time to stay in, unless I want to make a grid floor to sit on above the bottom which I haven't. After a number of years use the seams got to leaking a bit too much so I caulked them. Eventually I'll make a better one for more people, since the oval tank is only large enough for 2.

I will be recreating this excellent project! Thanks for the crystal clear tutorial.

Very well done! It's so easy to have fun. Thanks for taping and sharing.

I love this, it's like luxury in a simpler time. Beautiful😘

This is why when building a home you put your wood burning stove directly on the other side of you bathroom/shower/tub. If you have a shared cement or rock wall to hold heat between the stove and the shower as well as run hot water or copper tubing through the wall and into a gravity fed water heater you get free hot water while you warm your home in the winter :)

At my friends cabin there is a regular fiberglass hot tub and have the copper coil/wood fire as the heat source. Works great.

Awesome! I'd probably end up using a lot more tubing in a chambers, like a boiler tank uses, or an old lead-free radiator (or a few stacked) to gather much more of the heat. But awesome start! Or... heat the tub directly underneath with a skirt and have some smooth layer shielding the user from the floor but will let water flow around under it. 😊

Great vid, the inlet at the top of the tub if you put a 90* on it with another section of copper down into the tub. the terminal siphoning would push the water. So your hot water would enter the tub from the bottom, Evenly heat the tub

This is going to be the next project I do! I've been planning it for a little while but this one is heaps simpler than what I was planning.

Ahhhh! watching the chickens zoom around makes me sooo Happy!

Here are a few ideas you, or someone making this, may find useful. You could wrap the copper around 8" Duct Pipe from a Stove and move this unit inside. Also you could make more loops closer together so it heats the water faster. Having the copper wrap around the Stove Pipe would keep the smoke at bay and allow the heating to be a bit more efficient. Depending on the Drum you use for the Burner, you may want to make multiple Copper Runs to Multiple Stove Pipes to allow for faster heating of the water, perhaps a copper pipe for each side. Also you may want to install some sort of circulation pump to move the water a bit faster to keep hot spots from taking place. Or you just might want to put a Pound Pump in the Tank to just circulate the water that way. Of you could must make a Copper Run, two connectors at the bottom with a Circulation Pump only, to circulate just the Tub Water so that is move the Cold Water constantly. Great Project....

Pretty cool man!

The enclosure for the fire would also probably help you regulate temperature better. You could have a door which allows heat to escape when open, or maintain it when closed.

Thanks for doing it in fast motion, saves a lot of time. I don't have 'unlimited'' data or time. Thanks again.

I'd say to insulate the the tub to retain the heat also..Maybe sand or vermiculite since it's light.. Great vid and thanks for sharing the knowledge !!

That's a cool idea, Ben. Nice one.

Cool, but I want to see a wood fired infinity pool next ;)

Cool video. Good naration and speed. Your suggestions at the end I totally agree with. I would like to suggest some of mine. I dont know how much you want to upgrade but here goes. First I would definitely change the top water attachment to a metal or both. Second for sure I would insulat the tub.This would reduce heat time more that enlarging the copper tubbibg. But still enlarge it. Add something to protect the head from the cold. Some where to put a towel. I have other idea but don't know how upscale you want to go.

great video. a stove inclosure will defintely be the way to go. Wondering what improvements could me made for heat exchange? Is copper tubing the best tubing for the task? Your project just really has my mind working overtime. I have wanted to do a variation of your tub for a long time. thanks again.

I've done this with my pool about 5 years. Pretty shocking how well it works

i dont know why but i found the chickens pecking at the gravel very funny

I love how people with tiny yards are the most creative.

What a great video! Very clever, well filmed.

My favorite part was the chicken running around. haha they looked soo cute ! ..but yeah that was awesome

we rinsed off the chickens feet :)

A friend did that with a bigger tub for 2. She set it on the ground, filled it with water, dug a small hole at one end and built a very small fire in the hole. Worked great.

I think using a heat shield to protect your copper from direct flames would help it to last longer, as well applying a spray in liner to the stock tank would make it more comfortable and prevent rust.

you gained a sub with this project !

A Czech friend of mine did something similar but had done it with a small above ground swimming pool and the water was circulating through the pools Pump . The coil of copper pipe were in the fire box of his home made smoker . So while waiting for freshly smoked meat and cheese we had a pool party in winter . Czechneck engineering was my comment !

What a cool idea, It's easy to do and the design is very flexible. The way things are going globally this could be the bathtub of the future!!!! 😂😂😂😂😂😂

I'm in the midst of building a cabin (We've been hampered by bad weather felling trees and just about every weather mishap you can imagine) the cabin has a shower/toilet room but I think that this idea would be great after a day of freezing in Scotland. ..I think I would build an outhouse with access from the cabin and perhaps fit one of those home made propane tank woodstoves with the coils...I reckon that would keep the outhouse and the water nice and warm. ..I think this is a fantastic idea. .Thanks x

The best part of this video were the chickens

Aaawww he is so sweet to the chicken. My kind of man right here!!

Simple science. Effective. Great for off grid. A drain valve on the tub would turn it into a heated bath tub (using a smaller tub). The coil heating system has several other possibilities too.

That's a good looking project, there. Nice work!

This is a great idea, I will be buying one to do the same. I was wondering, is it okay to use sea salt or will it corrode the tub? Also, will it leach lead?

Love how you just have chickens roaming around in these videos

This is an awesome proof of koncept. Right on man.

omg your chickens are so supportive!

Why not add a valve to stop the circulation of the water. That way you can "control" the temperature of the water by reopening and closing the valve.

Omg Ben...that bod though. Hahaha 😳

When I was a kid in Croatia we had a wood-heated bathtub where there was a water tank (similar to today's water heaters you find in your basement, but only about a foot in diameter). There was a place to put the wood in right uner it. When the water was hot we filled the bath. The tank kept filled up and kept heating as the wood burned. Great baths, never this much wasted wood. Was too young to remember the other details of it.

That looks a great way to relax

Shirtless Ben-Thank You-Yep, I went there!

I used the flux capacitor from my Dad’s old DeLorean to help pump the water faster. Now it’s November 2018.Does anyone know how to get me back?

Very interesting! Everyone on youtube has inspired us to start our own homesteading channel. One day I will have a hot tub!

OMG! Perfect for off the grid living! 🙌

I think more coils and a tighter spiral would also increase efficiency.

Try insulating the tub. You can also create an inclosure for the fire and extend a chimney increase the amount of pipe exposed to the fire and insulate the rest

I love it when i see you tubers from the bay area

I knew I had to subscribe when You added the 🐥 prints! lol perfection!

immortalized chickens - amazing :D

seems this would be good for an off-grid situation.

really terrific concept and presentation

Insulation around the water tank would help immensely, Great Video!

I like it, came out great. Probably didn't need to do all that extra work with the concrete pads. I would have removed 2-3" of soil, tamped the soil, then applied a layer of gravel followed by a layer of sand. That tub wouldn't move. The only problem, is having to smell smoke while enjoying that hot water.

Dig a hole underneath the tank, fill it up with firewood and that's it!!

WOW! What a great idea. Congrats again!!!

I think this is awesome! Gonna do this where I live! There is snow on the ground but that's ok.

Very nice job! Forget the negative comments you did great... Keep up the great work 👍👍👍

Now build a robot that puts wood in the fire automatically!

Nice man! Just getting into your channel. Love the work!

Hey this is great and very simple! Great job!

Put the copper coil inside something like a rocket stove made out of an old propane tank or old hot water heater. Maybe even coat the inside of tub with porcelain and enclose outside of tank with wooden box to help insulate tub. Maybe even sit the tank inside a wooden box and leave a couple inches on all side and then fill with spray foam?

Maybe you can add a small water pump so it can recirculate way faster?

Excellent proof of concept, refinements to come.

I love it. I always want to make a swimming pool out of a big round 18 foot one. I will watch more .

very cool....or should i say warm....lol.

Iron rods and copper tube... bad combination. Sureley corrosion will start accelerated by heat transmission.

Chickens need small rocks for their crawp (gizzard), to grind their food. That's why they were interested in your gravel. Feed and Seed stores sell grit for chickens, as well as crushed shells for calcium for egg shells. Love the tub!

Saw Santa Barbara on your weather app.. I live here in SB too! Never expected to see that!

dude you look good #nohomo

now add onions, carrots, some herbs...........

Excellent idea! Hot water from the fire! Super!

super clean design. nice work!

Interesting build. If I do something like this, I will probably build a rocket stove and could the copper around it. I think the rocket stove may be a little more efficient than an open fire.

you looked much more attractive in the video thumbnail.

Worked better than I expected as well

Hello, loved the vid, very inspirational, but I need to know, Where did you got the actual tub? Thank you :)

where's the girl from the thumbnail.... 😁😁😁

You should make a rocket stove for this. It's way more efficient on wood.

Looks like some cool ideas! Great work

In the 80's when I worked on harbor tugs, some of the boats had what looked like wood burning stove's that ran on diesel oil. On the side with the burner there was a single coil of copper that led to a probably 15 gal tank on the opposite side of the bulkhead and the same set up with just convection to circulate the water. On long days you'd have to be careful because the hot water coming out of the tap would be hot enough to scald you.