Manufacturer of a wide range of products which include WATERBOSS Plastic Compression Coupler Socket and Coupler Tee.
What is the difference between HDPE and Plastic Compression Fittings?
Temperature range. While both plastics are relatively heat-resistant, HDPE has a higher melting point than most at 160ºF. HDPE plastics also have a lower cold brittleness temperature than PET plastics, resisting cold up to -50ºF, while PET plastics can only handle temperatures as low as -40ºF.
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Before assembly, the threads should be lubricated and sealed with a non-hardening pipe dope. In making up threaded joints, care must be taken not to over tighten the joint. Generally, one to two turns past finger-tight is adequate. Further tightening may split female threaded plastic parts.
The answer is very simple; compression fittings are extremely reliable! These fittings are a safe choice because they are leakproof and can be used in many types of high-pressure situations.
If the nut is overtightened the ferrule will deform improperly causing the joint to fail. Indeed, overtightening is the most common cause of leaks in compression fittings.
Many, but not all, compression fittings are suitable for use with plastic fittings and pipe. Users should therefore check for compatibility. Compression fittings with short tube stop depth or hard olives should not be used with plastic fittings or pipe.
