How to INSTALL a HOT SHOWER Heat Exchanger in a 4x4 (@nextmeridian.expedition)
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- เผยแพร่เมื่อ 16 พ.ย. 2021
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This week again we get a bit more technical and install a heat exchanger system for our 65L water tank. Converting the tank into giving us the possibility to warm up the water. After our trip in Iceland we knew we needed to get a warm shower installation! We really had a hard time with cold water.
We learned a lot during this installation and we are happy with the results.
We connected tubes going from the cooling pipes of the engine into our water tank so that the heat of our engine would also heat up our water tank. We installed a temperature sensor and a switch to activate or disactivate the heat exchanger, meaning we can regulate the heat of the water tank or leave it cold or room temperature if we wish.
We want to give a huge thank you to our friend George at RoverLand in Belgium who kindly made the full installation.
We're very happy to be an ambassador of RoverLand who primarily specialises in heating systems for Vans and 4x4.
🔗 www.roverland-expedition.be
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Owsome selution. 👍🏻
Cheers. 🍷&🍺
Great informative video . Cheers from Steve Stott in Sutherlin Oregon U.S.A.:):)👍🏼
What is the water tank that you went with? Do you have a link that might get you some sponsorship money?
it is the water tank we used. for the installation we worked with our friend George and his company is Roverland in Belgium. the water tank is sold by RRC in france. no partnership but you can say you come from us it never hurts!
good in theory, but what happens if you get a coolant leak inside the tank? My personal preference is a heat exchanger external to the tank and pump the water from the tank through the heat exchanger and to where you want it. You can then mix with cold taken prior to the heat exchanger to get the desired temperature, and zero cross contiamination risk as the heat exchangers are guaranteed for well in excess of everything that will ever be put through it.
Agreed! Keep the coolant under the bonnet. Move the water, not the coolant
6:49 😊
I'm presently restoring a Defender which I will be installing a heat exchanger, today I'll be making the mounting bracket in the engine bay. I like the fact that your using valves, I'm wondering why were they placed so close to the tank, wouldn't it be better to have them in the engine bay? I'd like to know your logic as it may help me in my decision to where I place mine. BTW, great video. 👍
Hi. There is no difference between having it in the engine bay or next to the water tank, that is a personal choice. We had it next to the tank as there was un-utilized space. In our engine bay are adding a pre-diesel filter so we wanted to keep some space for that. Also having the on/off switch in the engine bay you are closer to the engine coolant circuit wasting less fluid in the circuit if there was to be leak one day. (even though Coolants doesn't cost much).
pro
hey Nick, how long does the hot water remain after the engine is turn off? and suddenly you have more cold water?

Hey Jordi, really depends on the outside temperature. I never really tested so i'll have to let you know. But because the water tank is inside the car it should hold it's heat for a while. If i had to guess, i'd say to go from 45 degrees Celsius back to room temperature, maybe 1.5 hours?
By the way, it could be used as heater before going to bed and bring the water up to around 60 degrees.
Hello Jordi, as Nick says it really depends how much your tanks is exposed to the the outside and the temperature. From our experience our tank keeps warm for around 5-6 hours after we stop driving. (full tank - 65l)
What a coincidence, at this very moment I am also building a hot water system in my defender my 07. However, I have opted for a 6L stainless steel tank where I place a homemade copper heat exchanger. (I have two 35L watertanks in the footwell behind the front seats.) I can then regulate the water temperature with a thermostatic valve. I have yet to order the rubber hoses, can you tell me what inner diameter these are? Can you also say which temperature sensor and switch you used? This would really be an interesting addition. Thank you very much and keep up your beautiful work.
Hey, yeah it’s a good idea as well to have separate water tanks to keep one warm for showers and a cold one for other usages.
Regarding the pipes, screen and switch I don’t know the brands and RoverLand Expedition has been the one to order it all. If you check our website under partners you’ll have his website and Instagram and you could ask him directly.
I’ve asked him to write back on this comment thread as well.
Website: nextmeridianexpedition.live