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[GMCnet] GMC Water Heater Elements [message #337847] Sat, 13 October 2018 19:18 Go to next message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
Senior Member
Having no experience with GMC water heaters, I'm dependent upon Y'All for
advice: Our 80 gallon home electric water heater developed a leak last
week. Before they hauled the hulk away, I removed the two heating elements
(3500W & 4000W, 240vac IIRC) and the two thermostats. I've read here that
such elements are good replacements for those in GMC heaters. If so, I'll
bring these to GMCMI Tallahassee as giveaways; otherwise they'll go into
the trash. Here's the link to a photo of them; they're obviously well
used, but were working perfectly:

What say ye?: Keep 'em or throw 'em?

Ken H.
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
Re: [GMCnet] GMC Water Heater Elements [message #337849 is a reply to message #337847] Sat, 13 October 2018 20:28 Go to previous messageGo to next message
tphipps is currently offline  tphipps   United States
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Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
Senior Member
Ken, Keep them
The wattage is halved, running on 110, but they will last almost forever. I'm not sure about the thermostats. For free, it's buyers choice. LOL

Tom


2012 Phoenix Cruiser model 2552 KA4CSG
Re: [GMCnet] GMC Water Heater Elements [message #337851 is a reply to message #337849] Sat, 13 October 2018 20:42 Go to previous messageGo to next message
k2gkk is currently offline  k2gkk   United States
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Registered: November 2009
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Senior Member
If you run a 240 Volt heater on 120, the wattage will be down to 1/4 of rated. Half the voltage will result in half the current as well. 1/2 x 1/2 = 1/4.

D C "Mac" Macdonald​
Amateur Radio K2GKK​
Since 30 November '53​
USAF and FAA, Retired​
Member GMCMI & Classics​
Oklahoma City, OK​
"The Money Pit"​
TZE166V101966​
'76 ex-Palm Beach​
k2gkk + hotmail dot com​

________________________________
From: Gmclist on behalf of Thomas Phipps
Sent: Saturday, October 13, 2018 20:28
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] GMC Water Heater Elements

Ken, Keep them
The wattage is halved, running on 110, but they will last almost forever. I'm not sure about the thermostats. For free, it's buyers choice. LOL

Tom
--
2012 Phoenix Cruiser model 2552
KA4CSG

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Re: [GMCnet] GMC Water Heater Elements [message #337852 is a reply to message #337851] Sat, 13 October 2018 21:05 Go to previous messageGo to next message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
Senior Member
I understand the electrical details. What I don't know is whether these
elements will fit into a GMC heater.

Ken H.


On Sat, Oct 13, 2018 at 9:43 PM D C _Mac_ Macdonald
wrote:

> If you run a 240 Volt heater on 120, the wattage will be down to 1/4 of
> rated. Half the voltage will result in half the current as well. 1/2 x
> 1/2 = 1/4.
>
> D C "Mac" Macdonald​
> Amateur Radio K2GKK​
> Since 30 November '53​
> USAF and FAA, Retired​
> Member GMCMI & Classics​
> Oklahoma City, OK​
> "The Money Pit"​
> TZE166V101966​
> '76 ex-Palm Beach​
> k2gkk + hotmail dot com​
>
> ________________________________
> From: Gmclist on behalf of Thomas
> Phipps
> Sent: Saturday, October 13, 2018 20:28
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] GMC Water Heater Elements
>
> Ken, Keep them
> The wattage is halved, running on 110, but they will last almost forever.
> I'm not sure about the thermostats. For free, it's buyers choice. LOL
>
> Tom
> --
> 2012 Phoenix Cruiser model 2552
> KA4CSG
>
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> GMCnet mailing list
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
Re: [GMCnet] GMC Water Heater Elements [message #337882 is a reply to message #337852] Sun, 14 October 2018 14:15 Go to previous messageGo to next message
JerryW is currently offline  JerryW   United States
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Registered: August 2018
Karma: 1
Senior Member
Tom
Sorry, but the wattage is 1/4 if you run a 240 volt element on 120 volts. So a 240 volt 4000 watt element running on 120 volts would put out 1000 watts.

Emery Stora

>> From: Gmclist on behalf of Thomas
>> Phipps
>> Sent: Saturday, October 13, 2018 20:28
>> To: gmclist@list.gmcnet.org
>> Subject: Re: [GMCnet] GMC Water Heater Elements
>>
>> Ken, Keep them
>> The wattage is halved, running on 110, but they will last almost forever.
>> I'm not sure about the thermostats. For free, it's buyers choice. LOL
>>
>> Tom
>> --
>> 2012 Phoenix Cruiser model 2552
>> KA4CSG
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>>
>> https://eur04.safelinks.protection.outlook.com/?url=http%3A%2F%2Flist.gmcnet.org%2Fmailman%2Flistinfo%2Fgmclist_list.gmcnet.org&amp ;data=02%7C01%7C%7Ce4b7f938b50c4b06b79f08d63174e229%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636750775404909623&sdata=DX2yyJ3TTT9QOyCim4HW xON8LcEnFV2YzKsaEexcYuk%3D&reserved=0
>> _______________________________________________
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Re: [GMCnet] GMC Water Heater Elements [message #337893 is a reply to message #337847] Sun, 14 October 2018 16:30 Go to previous messageGo to next message
jhbridges is currently offline  jhbridges   United States
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
Senior Member
I taught Phipps Ohm's Law Smile Smile

--johnny


Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons. Braselton, Ga. I forgive them all, save those who hurt the dogs. They must answer to me in hell
Re: [GMCnet] GMC Water Heater Elements [message #337899 is a reply to message #337852] Sun, 14 October 2018 21:05 Go to previous messageGo to next message
cadelec is currently offline  cadelec   Australia
Messages: 303
Registered: September 2011
Location: Brisbane Australia
Karma: 1
Senior Member
I think the gmc element is a 1 inch npt thread

Trevor Brisbane Australia Siesta Koala 76 Edgemont (old Bobby Moores) 71 Cadillac Eldo Convert 58 Cadillac Eldorado Brougham Project
Re: [GMCnet] GMC Water Heater Elements [message #337901 is a reply to message #337899] Sun, 14 October 2018 22:33 Go to previous message
JerryW is currently offline  JerryW   United States
Messages: 256
Registered: August 2018
Karma: 1
Senior Member
The original element (at least in my 1977 Kingsley) is a square flange mount with 4 bolts in the corners that bolt to a matching flange on the water heater. A gasket fits between the flanges.

More modern heating elements have screw threads. One can purchase an adapter flange which has a threaded section in the center. This makes it easier to change the element and allows the use of the modern elements. I bought the adapter at Home Depot many years ago.

Emery Stora
77 Kingsley
Frederick, CO

> On Oct 14, 2018, at 8:05 PM, Trevor Pordage wrote:
>
> I think the gmc element is a 1 inch npt thread
> --
> Trevor
> Brisbane Australia
> Siesta Koala 76 Edgemont (old Bobby Moores)
> 71 Cadillac Eldo Convert
> 58 Cadillac Eldorado Brougham Project
>
>
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