Do you use Teflon tape on toilet supply line?
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Simply so, does toilet supply line need Teflon tape?
Use the plumber's Teflon tape and wrap the stems located at the water supply valve at the base of your toilet . Teflon tape is used to make an airtight seal between the compression nuts on the ends of the water supply line and the connectors.
Beside above, how long are toilet supply lines? Typically they are 3/8” in diameter, but toilet supply line size can vary in length, usually anywhere from 9” to 20”. Measure for accuracy to ensure you are buying a part that will match your installation.
Subsequently, one may also ask, do an fittings need Teflon tape?
You should never use teflon tape /paste on AN fittings - the seal is made on the 37* face, not the threads. Pipe threads are a different story - those use tapered threads to make the seal (which isn't a very good seal BTW), so those damn near require teflon tape /paste to make sure the seal is reliable.
Should I use Teflon tape on brass fittings?
teflon tape and firm is sufficent because if you're just jaming the brass together you can break the seal provided by the teflon or similar, if using unions they seal brass to brass and use the above mention nudge and grunt rule, just be carful not to mishape the fitting as brass can crack or bend with undue force.