The typical recommendation is not to use teflon tape on compression fittings. That being said, I have in the past and it didn't hurt anything as long as you're careful not to over do it with wraps of tape. If it's not leaking, I'd leave it alone.
__________________
Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
|