Compression Fittings

Compression Fittings
Compression fittings are used to join two tubes or thin-walled pipes together. Compression fittings for attaching tubing (piping) commonly have ferrules in them. Compression fittings are also known as JACO style fittings, JEAK style fittings, and Parker FAST AND TITE fittings. Compression fittings are made of durable plastic or nylon. See more information on how to install compression fittings below.

Instructions for Installing Compression Fittings:
1. Cut the tubing end squarely with a tube cutter and remove the internal and external burrs (rough edges of the plastic after it was cut).
2. Insert the tubing through the back of the nut all the way through the nut assembly to the tube stop in the fitting body (see illustration). If the tubing does not enter the nut easily, loosen the nut one turn and then insert the tubing all the way to the tube stop in the fitting body.
3. Hand-tighten the nut. If the fitting is overtightened, the ferrule will deform and cause leaks. Overtightening is the most common cause of leaks in compression fittings.
4. Wrench tighten the nut 1/2 to 2 turns.
5. All nuts must be retightened when the system reaches operating temperature.

NOTE: It is not necessary to disassemble this fitting for application. Merely insert tubing to stop and tighten seal.
NOTE: Squeaking sound when tightening nut is normal. For pipe threaded connections, Plumbers Tape should be used.
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