"Speedy Jim" wrote in message
et...
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....ex?sku=466343
Jim
Thanks to both of you. And you're correct, it is "Ground Joint Union".
JC