The pressure buffer is a safety element designed to prevent water hammer in the pressure gauge, either due to overpressure or sudden pressure fluctuations.
It includes a regulating element (3) to adjust the pitch.
At the ends there is a socket for the sealing gasket.
It is not necessary to use any type of tow, hemp, PTFE, etc., which could get inside, blocking the passage of the fluid and causing damage to the installation.