Liaison 3-piece PVC for gluing

3-Piece Union 

The 3-piece fittings are the ideal fittings for joining PVC pipes as they do not contain any metal parts and the outer diameter is smaller. These fittings allow the creation of detachable joints between different pipe sections. 

The 3-piece couplings consist of two coupling sleeves, a nut and a gasket. 

The connection sleeves are manufactured with smooth terminations, in this case with glue connections (female). Complying with the standards and with the possibility of adapting to other components. They incorporate an EPDM gasket between the two sleeves to ensure watertightness, so there is no need to use PTFE tape. 

With these couplings, multiple combinations of different types of plastics can be made. In addition, we have several sizes available so that you can adapt your installation, from 16 mm in diameter up to 110 mm in diameter. 

Thanks to the PVC-U materials that compose it, it can be used in water, chemical and waste pipelines, among other sectors.  

Dimensions of the 3-piece union

The following table shows the outer diameter, the normal pressure and the references of the 3-piece couplings to be glued:

Consult the following table for the dimensions of the 3-piece fittings according to the outside diameter. 

Pressure / temperature diagram