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?
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
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 :)
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.
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