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Subject Author Date
Ground Union???? J.C. 01-21-2007
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Posted by J.C. on January 21, 2007, 11:42 am


We got a propane heater the other day. The installation instructions call
for a "ground union" between the incoming on/off valve and the heater
connection. What's a "ground union" and what happens if I don't use one?

JC



Posted by on January 21, 2007, 12:01 pm



J.C. wrote:
> We got a propane heater the other day. The installation instructions call
> for a "ground union" between the incoming on/off valve and the heater
> connection. What's a "ground union" and what happens if I don't use one?
>
> JC

I might be totally wrong with this but I believe a ground union is a
connector that is grounded to allow static electricity to dischage
safely. I believe this is only used on fixed natural gas or the big
propane tanks.

If you Google > "ground union" propane < there are a bunch of pdf
files explaining what they are .

Like all gas things I assume if something goes wrong you get a fire and
massive explosion :)


Posted by Speedy Jim on January 21, 2007, 12:09 pm


J.C. wrote:

> We got a propane heater the other day. The installation instructions call
> for a "ground union" between the incoming on/off valve and the heater
> connection. What's a "ground union" and what happens if I don't use one?
>
> JC
>
>

That should read "ground joint union".

Look closely at a black iron (malleable) pipe union
and you'll see an embedded ring of copper or brass
which is carefully ground and polished to make
a leak-tight seal between the union halves.

http://www.fastenal.com/web/products/detail.ex?sku=466343

Jim

Posted by J.C. on January 21, 2007, 1:45 pm



> J.C. wrote:
>
>> We got a propane heater the other day. The installation instructions call
>> for a "ground union" between the incoming on/off valve and the heater
>> connection. What's a "ground union" and what happens if I don't use one?
>>
>> JC
>
> That should read "ground joint union".
>
> Look closely at a black iron (malleable) pipe union
> and you'll see an embedded ring of copper or brass
> which is carefully ground and polished to make
> a leak-tight seal between the union halves.
>
> http://www.fastenal.com/web/products/detail.ex?sku=466343
>
> Jim

Thanks to both of you. And you're correct, it is "Ground Joint Union".

JC



Posted by Tom The Great on January 21, 2007, 4:30 pm



>We got a propane heater the other day. The installation instructions call
>for a "ground union" between the incoming on/off valve and the heater
>connection. What's a "ground union" and what happens if I don't use one?
>
>JC
>


A google search turned up this discussion:
http://www.plbg.com/forum/read.php?1,276139

hth,

tom @ www.FreeCreditReportAdvice.com


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