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Old 05-21-2010, 06:00 PM   #16
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Water Heater last 5 minutes?


Quote:
Originally Posted by Yoyizit View Post
Building wiring is the only thing that has phantom voltages because of conductors running next to each other for long distances, and any incand. bulb kills them. So, load down your meter with a bulb when making voltage measurements.
Keep us posted. . .
What in the world are you talking about? If you don't know what your talking about, please refrain from offering advice or clarify what you talking about.

This looks like a reasonable step-by-step

http://www.wikihow.com/Test-a-Water-Heater-Thermostat

And when all else fails, call a reputable plumber.

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Old 05-21-2010, 10:23 PM   #17
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Water Heater last 5 minutes?


One more thought; have you noticed any air bubbles/pockets when you run the hot water?

A burned-through element will act as an hydrolysis unit and produce hydrogen and oxygen gas.
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Old 05-22-2010, 02:08 AM   #18
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Water Heater last 5 minutes?


I just happened to have a Home Depot ad for a 50 gallon water heater. It was only $250.. The 40 gallon was $30 cheaper. Not sure which size I would prefer. But maybe I will just get a new one, because after inspecting my current water heater its dated 2000 and they are good for what 10-15 years?

what do you guys think fix it or just replace it?
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Old 05-22-2010, 09:47 AM   #19
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Water Heater last 5 minutes?


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Originally Posted by cbzdel View Post
I just happened to have a Home Depot ad for a 50 gallon water heater. It was only $250.. The 40 gallon was $30 cheaper. Not sure which size I would prefer. But maybe I will just get a new one, because after inspecting my current water heater its dated 2000 and they are good for what 10-15 years?

what do you guys think fix it or just replace it?

Well, that certainly would resolve the issue if it is an actual heater problem (which more than likely is). As for the size, unless you live by yourself in a one bedroom home, go for the 50 gallon.
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Old 05-22-2010, 10:15 AM   #20
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Water Heater last 5 minutes?


10 years old I'd just buy the new one if you can
I'd also go 50g
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Old 05-22-2010, 10:48 AM   #21
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Water Heater last 5 minutes?


new water heater it is

Is there any problem with a $250 water heater or should I stay away? Because it seems cheap compared to other models.

I guess it was a Lowes ad that I seen and this is the model:
http://www.lowes.com/pd_null_?productId=1007227

Side note: Is it common to have (2) cold water inputs? (2) cold lines come out of the wall then merge together before entering the tank. seems weird!
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Old 05-22-2010, 11:47 AM   #22
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Water Heater last 5 minutes?


Quote:
Originally Posted by O'Leaky View Post
If you don't know what your talking about, please refrain from offering advice or clarify what you talking about.
Yes, sir.
http://en.wikipedia.org/wiki/Phantom_voltage


As to WH lifetimes, here are samples of
resi gas WH replacement ages

3 5 6 7 8
8 10 10 11
12 12 12 13
13 13 14 15
15 16 16 16
17 17 18 19
20 21 22 22
25 27 33 36
37 50

The avg. life is 17 years, with half lasting between 12 and 20 years. Elec. heaters are supposed to last longer; maybe that's why I can't get a decent number of samples for these.




DC area
May 22, 2010

Re: water heaters

Dear Mr. O'Leaky:

While I have your attention, I would appreciate your posting unbiased samples of resi. WH lifetimes, and any other appliance lifetimes that would be useful to forum members in making the repair/replace decisions that come up so frequently.
Surely, as a master of leaks, you must have information on this.

Thank you.

Regards,

Y. Izit

Last edited by Yoyizit; 05-22-2010 at 12:32 PM.
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Old 05-22-2010, 02:15 PM   #23
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Water Heater last 5 minutes?


Quote:
Originally Posted by Yoyizit View Post
Yes, sir.
http://en.wikipedia.org/wiki/Phantom_voltage



Dear Mr. O'Leaky:

While I have your attention, I would appreciate your posting unbiased samples of resi. WH lifetimes, and any other appliance lifetimes that would be useful to forum members in making the repair/replace decisions that come up so frequently.
Surely, as a master of leaks, you must have information on this.

Thank you.

Regards,

Y. Izit


Mr. Izit,

Let me clarify what I meant by my response. After rereading it, I realize it came across as a very harsh criticism.
I fail to see how any information on phantom voltages had an relevant's to the OP's particular problem, and would only serve to further confuse a DIY that did not seem clear on a repair.
Also let me say, that while a Phantom voltage might exist, Wikipedia should not be considered a viable resource. Colleges do no generally allow it to be a reference source.
As for the lifespan of a water heater, I can only speak from my experience. Keep in mind that water quality can drastically change differ from area to area, so my information will be based our typical water quality.
Water heaters around here last an average of 15 years here. Gas typically do not need maintenance in that time frame. However, electric do normally need serviced, at least once. The hardness of our water has a tendency to wear out lower elements.
With that being said, I often recommend that a customer change a heater when it is more than 12 years old, rather than repair.



Your Friend,



O'Leaky
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Old 05-22-2010, 05:45 PM   #24
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Water Heater last 5 minutes?


yoyzit,
Let's not resurrect the water heater life table issue again. Been there, done that; like a year ago.
Thanks!
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Old 05-22-2010, 05:57 PM   #25
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Water Heater last 5 minutes?


you guys are a hoot
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Old 05-22-2010, 06:32 PM   #26
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Water Heater last 5 minutes?


Quote:
Originally Posted by tpolk View Post
you guys are a hoot
I'm depending on you to add your definition to the 'Net.
http://www.google.com/search?client=...UTF-8&oe=UTF-8
I'm surprised it's not already here. Maybe it's only local to VA.

Here's a good one
"make a loud noise with the horn on a car. In the UK the device is called 'a hooter'"


Last edited by Yoyizit; 05-22-2010 at 06:34 PM.
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Old 05-23-2010, 08:35 AM   #27
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Water Heater last 5 minutes?


Quote:
Originally Posted by Yoyizit View Post
A 4500w element at 240v should measure (240^2)/4500 = 13 ohms.
Psst! The resistance of the heating element when cold will be considerably less.

Always turn off the power before measuring continuity or resistance which makes it difficult to measure the resistance while the element is still hot. Also the rest of the circuit must be disconnected from at least one of the two leads or terminals across which continuity or resistance is being measured
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Last edited by AllanJ; 05-23-2010 at 08:38 AM.
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Old 05-23-2010, 11:27 AM   #28
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Water Heater last 5 minutes?


You get what you pay for. What is Lowes selling for $ 250.00?
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Old 05-23-2010, 02:14 PM   #29
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Water Heater last 5 minutes?


Quote:
Originally Posted by AllanJ View Post
Psst! The resistance of the heating element when cold will be considerably less.
I thought the temperature coefficient of resistance for Nichrome was pretty small, much better than for tungsten.
http://www.allaboutcircuits.com/vol_1/chpt_12/6.html

So how much can you expect for the cold resistance of a 4500w Nichrome element?
How 'bout at cherry red [800 to 1000C]?

Last edited by Yoyizit; 05-23-2010 at 04:57 PM.
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Old 05-23-2010, 06:41 PM   #30
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Water Heater last 5 minutes?


No brainer. Got power to the unit? Buy a new one!

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