Improper pipe cutting
PP Compression Fittings fail from improper pipe cutting. Angled cuts cause poor sealing. The pipe must be cut squarely. Example: a leak develops from an angled cut.
Incomplete pipe insertion
The pipe must be inserted to the full depth. Partial insertion leaves a gap. The seal is compromised. PP Compression Fittings require full insertion.
Incorrect ferrule placement
The ferrule must be positioned correctly. It must be near the fitting body. Incorrect placement causes leaks. PP Compression Fittings require proper ferrule placement.
Over-tightening the nut
Over-tightening can damage the fitting. It can crush the pipe. This causes leaks. PP Compression Fittings require proper torque.
Under-tightening the nut
Under-tightening does not compress the ferrule enough. The seal is incomplete. Leaks develop. PP Compression Fittings require firm tightening.
Example: improper cutting
A plumber cuts a pipe at an angle. The fitting leaks. He must cut the pipe again. PP Compression Fittings require a square cut.
Example: incomplete insertion
A plumber does not insert the pipe fully. The fitting leaks. The pipe must be reinserted. PP Compression Fittings need full insertion.
Example: over-tightening
A plumber overtightens the nut. The fitting cracks. The fitting must be replaced. PP Compression Fittings require moderate torque.
Using the wrong ferrule
The ferrule must match the pipe size. Using the wrong ferrule causes leaks. PP Compression Fittings ferrules are size-specific.
Damaged pipe surface
Scratches or burrs on the pipe damage the seal. This causes leaks. PP Compression Fittings require smooth pipe ends.
Reusing old ferrules
Old ferrules are deformed. They do not seal properly. PP Compression Fittings ferrules are single-use.
Final installation errors summary
PP Compression Fittings fail from improper cutting, incomplete insertion, incorrect ferrule placement, over-tightening, under-tightening, wrong ferrule, damaged pipe, and reusing old ferrules. Proper installation prevents these errors. PP Compression Fittings are reliable when installed correctly. Example: avoid these mistakes for long-lasting connections.