The basic working principle
PP Compression Fittings work through a mechanical compression process. A nut is tightened onto the fitting body, which compresses a ferrule (ring) against the pipe. This action creates a tight, water-resistant seal. Example: a wrench is used to tighten the nut.
The three main components
Every compression fitting has three essential parts: a body, a nut, and an olive. The body has the pipe stop and the seating surface. The nut, when turned, forces the olive to compress. PP Compression Fittings rely on these components.
Step-by-step: pipe insertion
First, cut the pipe squarely and cleanly. Slide the nut and the olive onto the pipe. Insert the pipe fully into the fitting body until it reaches the internal stop. PP Compression Fittings need full pipe insertion.
Step-by-step: compression
Position the olive near the fitting body. The olive must be correctly placed to deform properly. PP Compression Fittings require careful olive placement.
Step-by-step: tightening the nut
Tighten the nut using a wrench. This draws the nut forward, pressing the olive into the tapered seat of the body. The olive is then compressed against the pipe. PP Compression Fittings seal through compression.
The sealing mechanism
The olive deforms slightly and grips the pipe. It also seals against the fitting body. This creates a dual seal that prevents leaks. PP Compression Fittings use both grip and seal.
Example: coupling installation
A plumber needs to join two polypropylene pipes. He uses PP Compression Fittings with a coupling. He inserts the pipes, positions the olives, and tightens the nuts. The coupling forms a permanent, secure joint.
Example: connecting to a valve
A valve is installed on a PP pipe. PP Compression Fittings are used to make the connection. The nut is tightened to seal the connection. The valve can then be operated.
No heat or glue required
The process is purely mechanical. No heat, adhesives, or solvents are needed. PP Compression Fittings are easy to install.
Tools needed
A wrench is the only tool required. The nut is turned until the joint is sealed. PP Compression Fittings require simple tools.
Tightening force
Tighten the nut firmly, but do not overtighten it. Excessive force can damage the fitting or the pipe. PP Compression Fittings need moderate pressure.
Final working summary
PP Compression Fittings work through mechanical compression. A nut pushes an olive onto the pipe, creating a secure seal. The pipe must be fully inserted and the olive correctly placed. No heat, glue, or special tools are required. PP Compression Fittings offer a simple and reliable connection method. Example: they are a trusted choice for many plumbing tasks.