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Old 19-01-2019, 13:47   #1
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Allcraft Water Heater - A real longshot question

So, this is a real long shot. I have an Allcraft water heater and it has lasted about 15 years. I really do not want to replace it because I don't think I can find another heater with the quality this one has. Allcraft is out of businesses and has been for some time. Unfortunately, the heat exchanger copper tubing developed a small pin size hole. So, I can only heat water with electricity. (This is why it is a good idea to place shut-off valves in the tubing from the engine to the heat exchanger)

When looking at the of Allcraft instructions and literature, I noted all the models used the same heat exchanger making me think the heat exchanger was an outsourced part for Allcraft. Does anyone happen to know the supplier???? Or, has anyone sourced a like replacement part?

Here is a link to the Allcraft parts. It is part #13 http://dublerfamily.com/Regina_ocean...r%20Heater.PDF
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Old 19-01-2019, 15:02   #2
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Re: Allcraft Water Heater - A real longshot question

Are you sure it can't be repaired?


Allcraft water heater parts ?


https://www.morganscloud.com/2010/04...ater-problems/


https://www.samsmarine.com/forums/sh...-Water-Heaters.



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Old 19-01-2019, 15:25   #3
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Re: Allcraft Water Heater - A real longshot question

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Are you sure it can't be repaired?


Clive
I haven't removed it yet because once I do so, I don't have hot water. So, I am not sure. I would prefer to replace it, if possible.
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Old 19-01-2019, 15:52   #4
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Re: Allcraft Water Heater - A real longshot question

Have you looked at this website?


ALLCRAFT | MMIMarine.com


http://www.mmimarine.com/mmi/index.p...tem=&cat_id=80



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Old 19-01-2019, 16:05   #5
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Re: Allcraft Water Heater - A real longshot question

Why would shutting off valves from the engine help longevity? It's freshwater coolant isnt it?
Also, is it possible other brand heat exchangers would fit or be adaptable?

Based on this view, it looks pretty typical, but why not take it out and have it repaired? That should be easy if just one hole. If not and the end plate that bolts to the tank is good, have new copper tubes brazed on it. If radiators are repairable that certainly is.
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Old 19-01-2019, 17:03   #6
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Re: Allcraft Water Heater - A real longshot question

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I got all excited there for a second but the site has no Allcraft products. But thanks for trying to help.
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Old 19-01-2019, 17:07   #7
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Re: Allcraft Water Heater - A real longshot question

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I got all excited there for a second but the site has no Allcraft products. But thanks for trying to help.

Yes OK. But I thought the pictures of some of the heaters looked so much like the Allcraft product but obviously not....


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Old 19-01-2019, 17:08   #8
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Re: Allcraft Water Heater - A real longshot question

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Why would shutting off valves from the engine help longevity? It's freshwater coolant isnt it?
Also, is it possible other brand heat exchangers would fit or be adaptable?

Based on this view, it looks pretty typical, but why not take it out and have it repaired? That should be easy if just one hole. If not and the end plate that bolts to the tank is good, have new copper tubes brazed on it. If radiators are repairable that certainly is.
Not sure where you read anything regarding helping engine longevity??

I have spent two days searching the internet for a like part to no avail so, if you have a website in mind please share.

I prefer to replace rather than patch.
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Old 20-01-2019, 10:24   #9
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Re: Allcraft Water Heater - A real longshot question

You're correct - Allcraft water heaters are worth fixing instead of replacing. We were lucky that the original owner of our boat bought the spares kit for the water heater and all subsequent owners kept it on board. So when the pressure relief valve blew in Mexico, we were able to fix it.

We changed the pressure relief valve and also replaced the heat exchanger - just because we had one and it had been in use for 30 years. The old heat exchanger we took out was still in great shape so we kept it as a spare. They are really, really stout and, in our opinion, can and should be fixed - instead of replacing the heater.

Get a couple of pipe fittings (a plug and a hose bib). Plug one opening and hook a garden hose to the other opening. Turn on the hose. You should be able to see where the leaks are. After marking the leaks, get it soldered. You might want to use a lead-free solder if you plan on drinking any hot water (tea?) but the exposure would be so minimal that it might not be worth the effort to track down the special solder.

A simple soldering iron and regular solder should do the trick. A new gasket is easy to make out of neoprene gasket material or cork. Trace out the old gasket (or pieces of it) and use a hole punch.

Good luck with the repair.
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Old 20-01-2019, 11:40   #10
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Re: Allcraft Water Heater - A real longshot question

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(snip)Unfortunately, the heat exchanger copper tubing developed a small pin size hole. So, I can only heat water with electricity. (This is why it is a good idea to place shut-off valves in the tubing from the engine to the heat exchanger)
Not really clear on this. Is the pinhole OUTSIDE of the actual tank? Like at the hose barb connection? If the leak was internal, how did you find it? Pink water from the tap?

Anyway, if you can remove the heat exchanger, you can repair it, though I seriously doubt that it could be done with a soldering iron! You'll want a propane torch, a MAPP gas torch would be faster. You'll need to sand the area of the leak to bright clean copper and use the appropriate flux, not just solder. Lots of how-to videos on YouTube for such a repair.
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Old 20-01-2019, 11:52   #11
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Re: Allcraft Water Heater - A real longshot question

Torrid is another excellent brand of water heater
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Old 20-01-2019, 16:03   #12
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Re: Allcraft Water Heater - A real longshot question

EXTREME HEALTH ALERT>

If you are leaking antifreeze into your hot water heater tank stop using it immediately and flush it thoroughly. Ethylene glycol is extremely poisonous.

Just closing off valves between the engine and the water heater does not eliminate a small reservoir of anti freeze. If there is no check valve preventing backflow into the cold water system everything from the pressure pump on should be flushed.
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Old 21-01-2019, 06:23   #13
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Re: Allcraft Water Heater - A real longshot question

Our Allcraft heater has been working well for 20+ years. When the time comes would much rather repair than replace. Have replaced the electric element a few times but easy to find those at the local hardware store. The heat exchanger on the other hand was promoted as unique to Allcraft and certainly more efficient than others I have experienced.
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