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Unregistered
Join Date: Aug 2000
Location: a wretched hive of scum and villainy
Posts: 55,652
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PTFE or teflon tape is good to around 450F, but I hate that crap. In fact it's banned in the $5 billion plant where I work.
Teflon paste pipe dope works much better and doesn't leave strings of teflon to contaminate the system later on down the road.
It's OK for sewer drain piping but that's about it.
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