In practice, threaded plungers are not used very often. Typically, where large-diameter pipes are used with a sufficiently thick wall, for example, 50 - 100 mm in diameter with a wall thickness of 4 millimeters and more or rigid PVC tubing.
For polyethylene pipes, it is advisable threaded fittings with a 3/8 inch PVC pipe with a metric thread 11 mm. The thread on the plunger is made conical, which allows the screw joint will be sealed.

All kinds of plungers are designed for operation at pressures up to 4.5 bar.

In most cases, using conventional plungers that are inserted into the hole in the pipe of the Special "punch". This connection is quite simple to do and it is no less secure than for example the screw.

How to work with conventional pistons tool

The easiest "puncher".

It is also used to insert the plunger into the bore.



A more serious tool for those who set many of the plungers. For a pipe diameter of 16 mm.



The same tool, but with the insertion of pipe 12 mm in diameter.



Professional universal tool. It can be adjusted for pipe diameters between 12 and 40 millimeters.





And this tool is also adjustable, for pressing the plunger in the pipe. Joining process. It is done. The results of the cross-section. Such a compound is also capable of withstanding pressures up to 4.5 atm. Here are simple and professional tools for work on the installation of the plungers. The choice of instrument depends on the amount of work that you have to perform.