Ref [1] Family Handyman
Use two types of Teflon on threaded joints
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Next Photo »Start by wrapping the male threads with Teflon tape (Photo 1). With the end of the threaded pipe facing you as shown, wrap the tape clockwise. Usually three layers is enough. Once in a while, you'll run into a loose fitting that requires four or five wraps. Stretch and tear the tape to complete the wrap.
Spread a thin layer of Teflon pipe joint compound over the tape (Photo 2). If you're working with plastic pipe, choose Teflon pipe joint compound that's compatible with it. Then start the threads by hand before tightening the connection with wrenches (Photo 3). Wipe away the excess.
Lubricate the ferrule on compression joints
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Next Photo »Align slip joints precisely for a tight seal
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Next Photo »Start the slip joint nut by hand, and twist it on until the threads are engaged correctly. Hand-tighten all joints first (Photo 2). Then adjust the trap parts until they're aligned and pitched slightly for drainage. This is key; a misaligned joint will leak, even with new washers. Finally, use a large slip joint pliers to tighten the nuts an additional half turn.
Plastic trap parts use hard plastic slip joint washers for a seal. Make sure the flat part is against the nut with the tapered side facing the fitting.
Choose flexible supply tubes
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The skinny copper or
chrome supply tubes used to
connect faucets and toilets (Photo
1) are tricky to cut, bend and align. But
you don't have to put up with them.
When you're replacing a faucet or toilet,
use flexible supply hoses with a braided
covering instead (Photo
2). They have rubber gaskets at each end
and don't require much force to seal.
They're available in many lengths and
are flexible enough to fit almost any
configuration. The only trick is buying a
connector with the correct size nuts on
the ends. Take your old tubing and the
nuts on each end along with you to the
store to be sure of an exact match.
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Start the nuts carefully and hand-tighten. Then tighten an additional half turn (Photo 2). Avoid overtightening. It's easy to tighten the nuts a little more if the joint leaks.
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