The union couplings are PVC pressure fittings whose function is to connect different pipe sections in order to make the circuit in the installation.
Choose the sleeve you need according to the type of joint: gluing, threading or mixed and according to the diameter you need for the installation.
We also have PVC parts such as the grooved flange sleeve that provides a rigid joint and withstands high pressures.
Choose the PVC sleeve you need to link the pipes of your installation. Remember to purchase the adhesive or Teflon to guarantee a perfect union in the fittings.