Turn an Old Coffee Maker Into an On-demand Water Heater (nevermind)

30,590

36

63

Introduction: Turn an Old Coffee Maker Into an On-demand Water Heater (nevermind)

Update:  Nevermind this one.  Too many electrical shock risks to make it advisable even as an experiment.

Hey guys, this was a fun and novel idea I had but on retrospect, I don't think it's really something safe enough to recommend for people to try for realz, so I am deleting it...

Thank you for reading!

Step 1: Are You Forgetting Something?

Did you read all the safety warnings and follow them?

Are you sure you want to do this?

Did you feed the cat? 


Step 2: Bathtime

Fill up the tub as usual. 

The initial water temperature of the bath was 96 degrees.

Step 3: Enjoy a Long Soak

Read a book or watch all the Sketchup tutorial videos from the comfort of your nice warm bathtub.

Step 4: How Effective Is It?



Thank you and stay safe.

Joby Transform It! Challenge

Runner Up in the
Joby Transform It! Challenge

Epilog Challenge

Participated in the
Epilog Challenge

Duct Tape Tough Contest

Participated in the
Duct Tape Tough Contest

Be the First to Share

    Recommendations

    • Potato Speed Challenge

      Potato Speed Challenge
    • Bikes Challenge

      Bikes Challenge
    • Remix Contest

      Remix Contest

    63 Discussions

    0
    cnathan
    cnathan

    7 years ago on Introduction

    I actually made a homemade water heater using a coffee maker and some other supplies. I travel in a motor home and do not like using LP gas so I ripped out the gas heater and built a rather cheap but efficient water heater. All in all, I spent maybe $60 to build and took a day to construct. I made a supply list and step-by-step instructions but it's not letting me add photos. I made a 20 gallon tank and it takes about 6 to 8 hours to get around 110-130 degrees. The only problem I have had with it so far is if I use well water, I have to clean the water lines once a month as lime and calcium build up. I use vinegar to clean lines.

    0
    foobear
    foobear

    Reply 7 years ago on Introduction

    Awesome, good to hear that this idea can actually work. I got so much flack for this one that I deleted most of the article. Maybe you will post an instructable that people will appreciate.

    0
    Rayvillian913

    Used this years back to heat a hot soaking tub for my wife. You don't need a pump just put the coffeemaker at the water level of the tub and add a siphon hose to put the water back in the coffeemaker tank, that will make the two water level stay equal. Works great except the pot would calcium up after about 2 months of continual use and have to be replaced. I've since gone to a 5 gal bucket heater and a waterbed thermostat teaked a bit to raise the temp to 110 degrees.


    0
    desertdog
    desertdog

    9 years ago on Step 4

    Interesting approach. Reminds me of a guy I know that used the heating element from an electric hot water heater heater to achieve the same thing.

    As far as I know he is still alive.

    0
    JesusFreke
    JesusFreke

    9 years ago on Introduction

    Now you just need a small water pump to pump water from the bathtub into the reservoir. Your local hardware store likely carries a small desktop water fountain style water pump. I had got one for around $25 iirc.

    Although, you would probably need some sort of water level sensor/cutoff for the reservoir too, otherwise you'll end up overfilling or under filling it.

    0
    foobear
    foobear

    Reply 9 years ago on Introduction

    I love those fountains, they seem full of hack potential. I saw one at Goodwill yesterday for 8 bucks and thought it was too pricey. Tempting though...

    0
    joeny1980
    joeny1980

    Reply 9 years ago on Introduction

    Nah, the pump element alone is only a few bucks . I bought one from Home Depot for like $6. Your combination of electricity and water is scary, but probably the most dangerous thing here is using that glass carafe in a tub. Imagine hitting the edge of the tub and breaking it. With shattered clear glass IN the water, next to your naked body... definitely extremely dangerous.

    I also think you can get rid of the body of the coffee maker and add a much larger reservoir.

    0
    SpencerW
    SpencerW

    Reply 5 months ago

    The way some people are talking here it sounds like there may be plenty of bodies to get rid of knowing how careless/drunk/high some people get at times.

    0
    foobear
    foobear

    Reply 9 years ago on Introduction

    Yeah, I only added the carafe part back in because as it's running, you can see all this extra heat from the heating element is just being wasted. I wanted to reclaim it somehow, putting the carafe full of water on there was all I could think of.

    0
    sheilamommy
    sheilamommy

    9 years ago on Introduction

    Room's ambient temp 51 degrees. And I thought I kept my house on the cool side. I will show your instructable to my kids to let them know how goodthey've got it at 65 degrees.

    0
    foobear
    foobear

    Reply 9 years ago on Introduction

    Yes, I bought an old fixer upper and it has no insulation anywhere! So, even with all the heaters on and the fireplace, we couldn't keep it warm enough. Outside was 20 degrees or so.

    0
    espdp2
    espdp2

    Reply 9 years ago on Introduction

    Hire a teenager to put in some fiberglass and spray-can insulation. It will save you lots of money over running the heaters and fireplace. Anything is better than a drafty box.

    Also, you should look into a pellet stove. They are just about the greenest heating solution out there, not TOO terribly expensive, and easier than a fireplace to keep going.

    0
    SpencerW
    SpencerW

    Reply 5 months ago

    Except a wood burning stove will pollute the air of your entire neighborhood and cause some smoke to be ingested by your family. if you don't mind lung cancer go right ahead. And respiratory issues.

    0
    DragonDon
    DragonDon

    6 years ago on Introduction

    Well this is disappointing. Heck, quite a few things here are a 'bad idea if you don't understand the risks'.

    0
    foobear
    foobear

    Reply 6 years ago on Introduction

    Yeah, I tried to delete this one, but it was in a contest, so I couldn't

    0
    mikesnyd
    mikesnyd

    9 years ago on Step 4

    What is the aproxima GPM output of hot water? Thanks. I was just wondering how long i am going to have to wait for a tub to be filled. I have a small 100L tub i want to fill for my camping expiditions. due to the girlfriend not wanting to camp unless she has hot showers/baths everyday. Thanks

    0
    tinstructable

    Can someone say sketchy? Haha, don't kill yourself with a coffee maker next to a bathtub.