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Old 01-07-2011, 05:20 PM   #21
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RE: Hot water heater

I would get the larger capacity. I have a six gallon on my Grady, which is okay for one shower, and a larger one on the MT, which is much better, but still not great. I think it's a 12. I would go with 15-20 gallons.
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Old 01-13-2011, 06:46 PM   #22
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RE: Hot water heater

Quote:
Arctic Traveller wrote:*In my entire life, I have never had a water heater fail due to leaks.*


In my previous home, I replaced the water heater five times in twenty three years.* Each one sprung a leak.* These were gas fired 40 gallon heaters, the ones you find at Sears or a home center.* We did have aacid well water.
*
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Old 01-13-2011, 06:51 PM   #23
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RE: Hot water heater

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Forkliftt wrote:Our aging 15 gallon hot water heater may need to be replaced this year.

Other than not heating water with no shore power or gen set running, what are the drawbacks of installing a much cheaper 15 gallon home version on the boat?
Why would you need to heat hot water?**

Drawbacks of installing a residential water heater in a boat?* If the boat is gasoline powered, there could be an explosion risk as the thermostat would not be ignition proteced.

When I cruise,*I have hot water from engine heat.* I don't have to be at a marina with shore power connected to have hot water.

*
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Old 01-13-2011, 07:12 PM   #24
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RE: Hot water heater

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rwidman wrote:
Why would you need to heat hot water?


Been waiting for that one!

We have a six gallon unit by Indel (sp?) I bought on clearance from Defender. There is always enough hot water for two. When we have guests I run the engine and suggest navy showers. So far so good.

Rob

37' Sedan


*
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Old 01-13-2011, 07:19 PM   #25
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Hot water heater

We have three options shore electric, DD 671 coolant and the Webasto boiler** The electric water heater is on a timer set for 4:00 AM to 5:00 AM and 7:00 PM to 8;00 PM which we use the summer, the Webasto Ever Hot is used in the winter and have not use the DD 671 coolant yet.* The electric is 11 gallon but the Webasto will provider hot water until we run out of water.***The Ever Hot also heats the engine room to 65+*degrees.*


-- Edited by Phil Fill on Thursday 13th of January 2011 08:20:59 PM
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Old 01-14-2011, 02:04 AM   #26
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Hot water heater

It's one of the reasons I went gas when I built Tidahapah.
Instant hot water all the time alongside or on the water.
No noise.
Along with gas cook top, instant heat control,*fantastic cooking + BBQ
Can't beat it.
The gen set is then for all the other leckky needs.

Benn

-- Edited by Tidahapah on Friday 14th of January 2011 03:05:10 AM
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Old 01-14-2011, 05:42 AM   #27
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RE: Hot water heater

The usual hassle with a propane heater is taking a shower.

Heat on , heat off , it drives the unit nuts , so sometimes the shower is cold.

The RV folks have the same hassles.

The simplest solution is a high in the shower stand pipe that drains back into a FW tank.

The shower is temperature adjusted and the portable end is stuck into the return.
Some pumping electric and some propane is "lost " , but it does save fresh water and makes a shower a delight.
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Old 01-18-2011, 03:09 PM   #28
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RE: Hot water heater

FF,
Heat on heat off is never a problem.
Mixers on all taps and the temp is set and the gas is regulated at a steady flow to maintain the set temp.
never a problem in the 16 years I have been using this system.
Still on the original hot water heater and I have lived aboard most of that time.

Benn
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Old 01-18-2011, 03:36 PM   #29
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RE: Hot water heater

Stupid question. Has anyone ever put a meter across heating element on a 220v heater to see how much is actually on each element? Is there a chance that it is actually 120 volts.

.
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Old 01-19-2011, 10:20 AM   #30
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Hot water heater

Quote:
LarryW wrote:Is there a chance that it is actually 120 volts. .
If it's a 120V element, sure.

Otherwise it's 220ish in the U.S. Various other volts elswhere.

Here's a link to show how a domestic heater can be wired. Read down the page beyond the "off peak" setup.

http://waterheatertimer.org/How-to-w...er-heater.html

*


-- Edited by RickB on Wednesday 19th of January 2011 11:21:19 AM
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Old 01-19-2011, 05:11 PM   #31
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RE: Hot water heater

Good question Larry. From RickB's link it looks to me as though 240 VAC goes to both elements. I think you were suggesting possibly the the upper/ lower elements may each be only 120 VAC?
We run our genset almost always. NL 8Kw, I wonder if it has a 240 VAC tap?
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Old 01-27-2011, 08:19 AM   #32
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Hot water heater

John.Greetings.

If I were to say that a water heater are a time bomb, i could be *>>>>

I would not recommend setting any water heater *house / boat above 120 degrees which can be / should *measured by a candy thermometer at the faucet, this should be done often.


John ,I have heard *of duel *shower faucets *fail to the point where you can get boiling hot water one minute and cold the next.


The Heater Temperature / pressure relief valves can and do *fail,we pipe our house vent ours out side. meaning when the blow it is like a volcano going off.

The temperature thermostats can fail and not trip out/off at their prescribed settings.

We know of two homes here where the water heater have exploded and gone up *through the roof as the bottom of heaters jackets can and do rust out.



Respectfully
Donald
Mainship Mega yacht.






-- Edited by SOMERS on Thursday 27th of January 2011 09:56:11 AM
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Old 01-28-2011, 06:43 AM   #33
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RE: Hot water heater

Any boat that uses engine coolant to heat domestic water WILL have coolant temperature water at the sink.

None of the input restrictions in the heater are 100% , so in time about 180F is normal..

The only solution is a tempering valve setup OTS at the chandlers.
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Old 02-02-2011, 08:56 AM   #34
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RE: Hot water heater

I love the 160 (or so) degree water in our 20 gallon tank following a day's run*- it allows many showers. A tempering valve as FF mentions is not a bad idea, but my faucet handles work just fine. I will leave the nanny temperature *discussions for our shore side systems.
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Old 02-03-2011, 04:02 AM   #35
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RE: Hot water heater

I will leave the nanny temperature discussions for our shore side systems.


Beware of young children, Scalding is "forever".
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Old 02-03-2011, 08:22 AM   #36
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RE: Hot water heater

FF Yes nanny. You forgot to mention the real kid issues on a boat

Slips
Trips
Falls
Drowning
Lost*at sea
Fire
Moving machinery
Sea sickness
Neck in window blind cords (Hunter sent me a notice on this)
Burns related to cooking ( a friends 2 year old pulled the fry grease over on herself)
Putting more than placard weight on boat

On our boat, 9 is the minimum age for multi day traveling with Grandparents for girls and 11 for boys. Scalding at the water tap is not an issue for us. Scalding at the stove is.
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Old 02-05-2011, 05:24 AM   #37
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Hot water heater

"Scalding at the stove is."


Power or sail this problem exists and for some reason boat assembelers refuse to help.

A fore and aft mounted range tosses pots off where 50% will hit the hull, 50% will scald the cook.

Simple solution is to mount the stove athwartships (that's side to side usually up against a bulkhead ) where there is less chance of scalding.

But the NA has to care more about people than layout .



-- Edited by FF on Saturday 5th of February 2011 06:26:02 AM
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Old 02-05-2011, 06:23 AM   #38
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RE: Hot water heater

Quote:
FF wrote:

I will leave the nanny temperature discussions for our shore side systems.



Some folks don't realize how hot the hot wated can be on a boat until they stick their hand in it.* By posting this information, some folks will be warned and stay safe.
*
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