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Old 12-16-2016, 10:01 AM   #21
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Originally Posted by Casita Greg View Post
Yep, the old "Hot Rod" heater element work-around. It replaces your sacrificial anode, because it screws into that same threaded port on the HWH. But the trade-off then is you have no sac. anode to protect your water heater if you use one of those.
A sacrificial anode is useful on steel water heaters only, not needed on aluminum tanks.
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Old 12-16-2016, 11:27 AM   #22
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2nd trailer we ever owned had a propane water heater. I removed in and put in a propane/electric start heater and loved it!

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Old 12-16-2016, 12:06 PM   #23
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I put a tankless hot water heater on the tongue and it as automatically starts when the hot water tap is opened.
No standby losses and nearly instant heat for as long as you want.

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Old 12-16-2016, 12:10 PM   #24
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Could you provide a link for that? I tried googling it and came up with just tanks.

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I put a tankless hot water heater on the tongue and it as automatically starts when the hot water tap is opened.
No standby losses and nearly instant heat for as long as you want.

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Old 12-16-2016, 12:30 PM   #25
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A sacrificial anode is useful on steel water heaters only, not needed on aluminum tanks.
My HWH is a porcelain lined steel tank, as are the majority of them. I can't recall seeing any with aluminum tanks, but I'll take your word for it that they exist.
I guess my question would be is whether the whole aluminum HWH tank becomes an anode then? After all, the two main "noble metals" primarily used for sacrificial anodes are Magnesium and Aluminum. Just wondering?
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Old 12-16-2016, 12:34 PM   #26
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I'm guessing HWH is 'hot water heater'?
Where do you get hot water to heat?
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Old 12-16-2016, 02:02 PM   #27
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Originally Posted by Casita Greg View Post
My HWH is a porcelain lined steel tank, as are the majority of them. I can't recall seeing any with aluminum tanks, but I'll take your word for it that they exist.
I guess my question would be is whether the whole aluminum HWH tank becomes an anode then? After all, the two main "noble metals" primarily used for sacrificial anodes are Magnesium and Aluminum. Just wondering?
Atwood's PDF says...
"The Atwood water heater is constructed of a core of high strength aluminum. the interior of the tank consists of a 15% thickness of 7072 aluminum (pure aluminum and zinc) which is fused to the core during the rolling process."
I assume you are technically correct in saying that the whole tank interior acts an anode.
Atwood prohibits the use of aftermarket anodes.

Suburban uses a sprayed ceramic liner as you described. Without an anode the corrosion seeks pinholes in the ceramic just like most home hot water heaters. The anode is an important component.

I don't have any data to back this up, but my guess from experience is that internal electric heating elements contribute more to internal corrosion than an external flame. So I think that aftermarket "hotrods" which go in the drain hole and replace the anode may not be such a good idea for a Suburban water heater and it might be best to get the electric heat as a factory option.

At any rate, both types generally last for decades unless they are allowed to freeze when full of water. I have seen this more than once!
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Old 12-16-2016, 03:35 PM   #28
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Sounds good to me Floyd. Good explanation.
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Old 12-16-2016, 05:08 PM   #29
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Could you provide a link for that? I tried googling it and came up with just tanks.

Frank




You have to figure out the plumbing and mounting for yourself.
Others have made a temp hookup to mount once parked, but mine is permanently installed.
While I was installing this I also installed some heat tracing for winter use.
I have used this wit one pound LP bottles and they last pretty long.
The cost on these things is pretty low at about $80 - 90 on ebay or amazon

https://www.amazon.com/Digital-Tankl...s+water+heater
Fastar LPG Gas 8L Tankless Instant 2gpm Hot Water Heater Boiler Stainless CE | eBay

These things have on demand igniters powered by two D cell batteries.
I like the fact that in my trailer there is no LP within the shell of the trailer(to make my wife happy)
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