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Old 12-19-2016, 07:03 AM   #41
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CAUSE....... In a few isolated parts of the United States where the water supply has a relatively high
pH (8+), water conditions will react with the aluminum anode to form excessive
amounts of aluminum hydroxide on the anode and in the bottom of the tank.
Aluminum hydroxide looks like “jelly beads” or a green, blue or gray gel like substance
in the heater drain or at faucet aerators.

http://r.search.yahoo.com/_ylt=A0LEV...2lNgy7QI7mhpU-

Not sure why aluminum tanks without the anode still forms this stuff.

Glass lined tanks ....few have them.
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Old 12-19-2016, 07:30 AM   #42
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Ah. Thanks, appreciate the ref.

Haven't seen evidence of that, but haven't looked closely at the drain (just a standard spigot), and no noises... but I'll check that when we start up again. Or maybe we're not in one of those "isolated parts of the United States..." Don't have an anode. In cases where the stuff forms even without an anode (if that happens?), maybe the tank material itself acts anodic?

So (good) stainless is better 'cause no jelly? (OK.) Or other reasons, too?

Glass-lined any kind of tank? Stainless, aluminum, whatever? Added insulation, I take it? I guess if not common, not a big deal...

-Chris
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Old 12-19-2016, 11:23 AM   #43
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Thanks for all of the replies and suggestions.
I have finally been able to read them today and will make a final decision soon.
One comment made the most sense to me though. As I may not keep the boat too much longer (I would like to upgrade in the next couple of years) I may just go with a name brand, lower cost unit.
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Old 12-19-2016, 06:08 PM   #44
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For what it's worth... Aluminium DOES cause Alzheimer's: Chris Exley says new findings confirm link | Daily Mail Online
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Old 12-19-2016, 07:08 PM   #45
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Quote:
Originally Posted by Bay Pelican View Post

Here is an approach I took. I replaced an older water heater before it leaked. My justification was that I was not selling the boat in the next few years, that sooner or later I would be replacing the water heater, and that any decent water heater I bought now would easily last until the end of my ownership of the boat.

Thus I bought a new water heater and installed it at my convenience, at the dock (I am usually not at a dock) with plenty of access to plumbing supplies. Did I buy it a few years early, likely. But it is likely that I will never have to worry about it again. Worth the carrying charges on a $300 item.
I agree. On the list it goes.
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Old 12-20-2016, 07:22 AM   #46
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I'm doomed. Almost 70 years of food cooked in aluminum pots and pans... and now this pesky aluminum hot water tank... I'm doomed.

I forget what the word "doomed" means. Forgot my name, too. Hmmm...

I couldn't figure out how to find "Page 3" on the online version of the Daily Mail. (Many, especially males, will know Page 3 was always the first page to check out...

-Chris
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Old 12-20-2016, 10:26 AM   #47
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RTF

That Al and Alzheimer's study was done on rats, politicians and nefarious Russian hackers. Al makes them all crazy, mean and forgetful.
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Old 12-20-2016, 11:33 AM   #48
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RTF

That Al and Alzheimer's study was done on rats, politicians and nefarious Russian hackers. Al makes them all crazy, mean and forgetful.
Such terrible things to do to rats.
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Old 12-20-2016, 01:11 PM   #49
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Well, we don't differ much from Rats
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Old 12-20-2016, 01:34 PM   #50
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Well, we don't differ much from Rats
Some of our modern biologic medicines, monoclonal antibodies, are are made from mice.
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Old 12-20-2016, 02:38 PM   #51
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"Slime" found in a boat's water system is likely aluminum chloride. This stuff is leached out of the aluminum alloy found in most recreational boat's water tanks by the reaction of the alloy with hypochlorite (AKA bleach) added to most city water systems. Fill your boat's water tank from city water-you get chlorinated. And your water tanks (including your water heater, if aluminum), form milky "slime". The stuff's harmless, but does plug filters regularly. More important, the leach sites form corrosion pockets that lead to premature failure of aluminum water tanks.

Regards,

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Old 12-20-2016, 09:27 PM   #52
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"Slime" found in a boat's water system is likely aluminum chloride. This stuff is leached out of the aluminum alloy found in most recreational boat's water tanks by the reaction of the alloy with hypochlorite (AKA bleach) added to most city water systems. Fill your boat's water tank from city water-you get chlorinated. And your water tanks (including your water heater, if aluminum), form milky "slime". The stuff's harmless, but does plug filters regularly. More important, the leach sites form corrosion pockets that lead to premature failure of aluminum water tanks.

Regards,

Pete
Thanks Pete, I've seen the slime but never knew what caused it.
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Old 12-20-2016, 09:44 PM   #53
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When I bought the Gulfstar it had a Home Depot hot water tank with brass fittings. I went take a good look at it, not easily done, and one of the brass fittings broke off in my hand. I replaced it with a Raritan 12 gallon unit from Defender and for no extra cost sent me one with the heat exchanger to run off the engines. The 12 gallon unit takes care
Of myself, my wife and one guest if we're careful. $800
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Old 12-21-2016, 08:21 AM   #54
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There are electric tankless water heaters. Would like to hear more.
They tend to draw to much current. Unless you set up a dedicated power cord for one.
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Old 12-21-2016, 06:43 PM   #55
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CAUSE....... In a few isolated parts of the United States where the water supply has a relatively high
pH (8+), water conditions will react with the aluminum anode to form excessive
amounts of aluminum hydroxide on the anode and in the bottom of the tank.
Aluminum hydroxide looks like “jelly beads” or a green, blue or gray gel like substance
in the heater drain or at faucet aerators.

http://r.search.yahoo.com/_ylt=A0LEV...2lNgy7QI7mhpU-

Not sure why aluminum tanks without the anode still forms this stuff.



Atwood claims their water heaters with the aluminum tanks will not do this and require no anodes? Hhmmm.
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Old 12-22-2016, 06:48 AM   #56
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Originally Posted by Goldenstar38 View Post
Atwood claims their water heaters with the aluminum tanks will not do this and require no anodes? Hhmmm.

I can attest, no anode. Haven't ever seen evidence of slime/jelly/etc... but then I haven't ever cut the thing open to examine the insides, either.

Our normal water supply is well water, so no city chlorine treatments. We do fully commission the whole fresh water system in Spring -- which means a temporary clean-out and freshening with a dose of chlorine, but that's rinsed out relatively quickly. Thereafter, we just cycle fresh water through the system often (seldom attach to the shore water inlet).

I have no idea about relative costs -- Atwood vs. Isotherm or Raritan or whatever -- and haven't worked with any of those others, so can't really compare the build quality or mechanics and so forth.

-Chris
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Old 12-22-2016, 07:02 AM   #57
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Quote:
Originally Posted by Goldenstar38 View Post
CAUSE....... In a few isolated parts of the United States where the water supply has a relatively high
pH (8+), water conditions will react with the aluminum anode to form excessive
amounts of aluminum hydroxide on the anode and in the bottom of the tank.
Aluminum hydroxide looks like “jelly beads” or a green, blue or gray gel like substance
in the heater drain or at faucet aerators.

http://r.search.yahoo.com/_ylt=A0LEV...2lNgy7QI7mhpU-

Not sure why aluminum tanks without the anode still forms this stuff.



Atwood claims their water heaters with the aluminum tanks will not do this and require no anodes? Hhmmm.
Because they are made with Alcoa Alclad aluminum sheet metal.
https://www.corrosionpedia.com/definition/65/alclad
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Old 12-22-2016, 07:12 AM   #58
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Originally Posted by ranger42c View Post
I'm doomed. Almost 70 years of food cooked in aluminum pots and pans... and now this pesky aluminum hot water tank... I'm doomed.

I forget what the word "doomed" means. Forgot my name, too. Hmmm...

I couldn't figure out how to find "Page 3" on the online version of the Daily Mail. (Many, especially males, will know Page 3 was always the first page to check out...

-Chris
Facts About Aluminum –Â*Pure Water Products, LLC

Cities purify tap water with aluminum sulphate.
So everyone is exposed. Aluminum is an unnecessary contaminant of food and water.

I have read Chlorella binds to metals in your body and removes them.
http://naturalsociety.com/proper-hea...tro-chlorella/
http://www.thehealthgladiator.com/th...out-chlorella/

This one is made in the USA and about cheapest you can buy for weight.
Not in capsules so it is like a green dust. I found mixing with apple sauce is ok. By itself It is like eating green fine gritty dust with a muddy flavour which no one would want to eat. But it is really good for your health.
https://www.amazon.com/gp/product/B0...0?ie=UTF8&th=1
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Old 12-23-2016, 07:16 AM   #59
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.................... Incidentally, I removed the temp compensating valve to allow dangerously hot water that lasts much longer than before removing it. Just thought I'd mention it as a possible way to extend hot water duration. It's effective for adults who know about it but could be dangerous for children. I plan to reinstall the valve for safety reasons before selling FlyWright..
Ultra hot water can hurt adults as well as children.

The valves go on the output of the heater. The valve mixes the extremely hot water from the water heater with unheated water to reduce the temperature to a safe level. This is no different than mixing it at the faucet but it eliminates the possibility of scalding if someone doesn't know or forgets.

If your engine has been running for a few hours, untempered hot water could be 180 degrees.
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Old 12-23-2016, 09:11 AM   #60
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Ultra hot water can hurt adults as well as children.
.
Wes

Nobody disputes what you are saying. Count me as one though that can adjust the cold and hot water valves in the head, showers or sink to suit my needs. I especially like the separate water valves at the transom shower after taking a dip in the cold North Pacific.
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