Build Instant Hot Water Heater.

Submitted: Tuesday, Jan 27, 2004 at 21:41
ThreadID: 10065 Views:13574 Replies:9 FollowUps:7
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Hi,

Can anyone tell me if it is possible to build a small portable instant HW heater suitable for camping? I would like to use it for washing dishes whilst camping. The HW would not need to be any hotter than 40 degrees C.
I would imagine that a few metres of 6mm copper pipe wound inside a upturned tin that is then placed on top of a gas burner would work? I would pass water through the pipe using a small 12 volt water pump.

Any ideas would be appreciated.

Cheers.
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Reply By: Member - Ross - Tuesday, Jan 27, 2004 at 21:46

Tuesday, Jan 27, 2004 at 21:46
Sounds like you're on the right track to me. Much quicker than my 5 gal ss beer keg storage unit.Fidei defensor

Rosco
AnswerID: 44538

Reply By: bernie1 - Tuesday, Jan 27, 2004 at 21:55

Tuesday, Jan 27, 2004 at 21:55
g'day just fitted a helton shower unit to 100 series. believe they make hw units as well. do a buisness search for helton in brisbane.
AnswerID: 44544

Follow Up By: Member - Paul T- Wednesday, Jan 28, 2004 at 07:28

Wednesday, Jan 28, 2004 at 07:28
Bernie

How have you found it so far?

Where did you fit it on the 100 series and what model heaton did you use?

I am thinking of installing a Heaton, but have the 100 series TD with not much room left in the engine bay with a third battery and compressor already installed.

ThanksPT
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FollowupID: 306742

Follow Up By: bernie1 - Wednesday, Jan 28, 2004 at 21:15

Wednesday, Jan 28, 2004 at 21:15
G'day Paul T.

So far so good. water is warm enough for shower, so we did a test with recirculating the water and had steam coming from the shower head after a few minutes. motor was at operating temp.

The 2 piece bracket in the kit I throw away. made my own cradle and mounted it above the tapit cover on the flywall. cradle fitted under wiring harness and pipes. When I picked up the kit from tony he recommended using a 80 series heat exchange (Inlet pipe at one end and outlet,shower connections the other end)

hope this helps

Bernie
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FollowupID: 306811

Reply By: Willem - Tuesday, Jan 27, 2004 at 22:12

Tuesday, Jan 27, 2004 at 22:12
Boil the billy.......better still, buy a 12 volt electric kettle for about $15

Cheers,
Willem

Googs Lake camp
AnswerID: 44553

Reply By: ROLANDE - Tuesday, Jan 27, 2004 at 22:29

Tuesday, Jan 27, 2004 at 22:29
Gibbsie,
Looking at same currently, best I can gather is 1/ Primus or Aussie Shower flow through units, about $400, 2/ Caravan type storage heater for $500, 3/ "Boiling Billy" 20Ltr can, avaliable in Melbourne, about $50. Fill with water place on/near campfire/stove, when hot, top up with cold water and hot water flows from spout. I'm not 100% happy with either system and don't want to run a unit in the vehicle if possible. If you have a better design let me know!
Rolande
AnswerID: 44562

Follow Up By: Shaker - Wednesday, Jan 28, 2004 at 17:30

Wednesday, Jan 28, 2004 at 17:30
I have the Primus one ... gets pretty damn hot!
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FollowupID: 306787

Follow Up By: rolande- Thursday, Jan 29, 2004 at 07:10

Thursday, Jan 29, 2004 at 07:10
Shaker,
How do you find it? Can you adjust temp easily? How much water do you use on average? Have a couple of water wally's on-board who need to be kept in control.
Thanks
Rolande
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FollowupID: 306835

Follow Up By: Shaker - Friday, Jan 30, 2004 at 10:11

Friday, Jan 30, 2004 at 10:11
I find it pretty good, the water temp can be adjusted by the gas control on the unit. It uses the same amount of water as the $39.00 12v systems.
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FollowupID: 306985

Follow Up By: rolande- Saturday, Jan 31, 2004 at 00:33

Saturday, Jan 31, 2004 at 00:33
Thanks for the first hand experience, will give these another look as it seems the best in a small field, just need to find another water source so they don't use all my drinking water,
Rolande
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FollowupID: 307069

Reply By: Diamond(due to duck season) - Tuesday, Jan 27, 2004 at 22:45

Tuesday, Jan 27, 2004 at 22:45
gday gibbsie.
easiest way is fit a heat exchanger(i use helton)
fit it on and no more cold showers/dishes water
a little over $100 not worth messing around your self i reckon.
cheers
due to duck season coming
ive decided to hide out
love jemima puddle duck
back after the season
AnswerID: 44567

Reply By: Gerry - Wednesday, Jan 28, 2004 at 09:47

Wednesday, Jan 28, 2004 at 09:47
Your idea should work, but be VERY careful not to create a sealed system. In other words, make sure you either create an open system (even with the tap closed) or at least have a reliable pressure relief valve in the system in case it overheats and the water turns to steam. I have seen the results of a domestic hot water system that literally exploded and destroyed half the house because of excessive steam buildup and the relief valve jammed. Don't want to put you off, just be aware of what can be created unknowingly without some careful thought.

Cheers
Gerry
AnswerID: 44591

Reply By: navaraman - Wednesday, Jan 28, 2004 at 14:17

Wednesday, Jan 28, 2004 at 14:17
As a plumber ga/fitter I back up what Gerry says about being very careful trying to make a DIY wter heater. I've seen water heated by the sun in black irrigation tube flash to steam when the pressure has been removed with very nasty consequences. I'd buy a ready made unit and be safe.
AnswerID: 44617

Reply By: Member - Mik - Wednesday, Jan 28, 2004 at 16:13

Wednesday, Jan 28, 2004 at 16:13
Gibbsie

have just completed making an all copper heat exchanger connected into engine cooling system and it works a treat. all hardware brought from local scrap steel merchant, including connections at the low price of $38. All that is needed is a little oxy welding know how.
350 mm of 75 or 100 mm copper tube
4 to 5 meters (i used 1/4 in ) copper tube
2 copper T's to suit heater hose
2 1/2 in to 1/4 in copper reducers
The wife is happy with it, so that all that matters
Hope this helps

MIK
AnswerID: 44634

Reply By: Rick Blaine - Wednesday, Jan 28, 2004 at 17:09

Wednesday, Jan 28, 2004 at 17:09
Gibbsie,

Mate have I got a deal for you. Buy my steam launch, ooodles of boiling water and you can fish or explore as well, seriously tho if you like I could email you a sketch of exactly what you want but you are on the right track anyway. another solution is to paint a 20litre drum matte black and carry it on your roof or just leave it out in the sun... even in winter & in about 4-5 hrs you will have 20litres of water at around 40 - 50c.
AnswerID: 44641

Follow Up By: Gibbsie - Wednesday, Jan 28, 2004 at 20:46

Wednesday, Jan 28, 2004 at 20:46
Hi Rick,

Thanks for your help. My e-mail address is

gibbsies@bigpond.com

Look forward to your e-mail.

I hope that I can be of some assistance to you in the future.

Cheers
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FollowupID: 306805

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