Tighten compression fittings firmly with two wrenches to crimp the ferrule onto the pipe (Photo 3).
Simply so, how tight should a copper compression fitting be?Ī good rule of thumb is to tighten the nut first by hand until it is too difficult to continue and then tighten the nut one half-turn more with the aid of a wrench the actual amount varies with the size of the fitting, as a larger one requires less tightening. There are also compression union fittings that join two pipes in a straight line. They are most commonly found on water shutoff valves, or stop valves, the type used on faucet and toilet water supply pipes. Likewise, can you use compression fittings on hard copper? Compression fittings create removable plumbing connections on standard rigid and flexible copper pipe and tubing. Repeated bending may cause the ferrule to lose its grip on the tube. In general, compression fittings are not as resistant to vibration as soldered or welded fittings.
As the nut is tightened, the compression ring is pressed into the seat, causing it to compress against the pipe and the compression nut, providing a watertight connection.Ĭorrespondingly, are copper compression fittings reliable?Īlthough compression fittings are generally considered more reliable than threaded fittings, there are some potential problems. A compression fitting is a type of coupling used to connect two pipes or a pipe to a fixture or valve.
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