PVC pressure couplings are PVC-U fittings with a solvent-weld socket at both ends. They join two lengths of matching PVC pressure pipe in a straight line.
Each socket fits over PVC pressure pipe of the same nominal size and is joined using PVC priming fluid and pressure-rated solvent cement. PVC pressure pipe sizes are nominal, so the stated size is different from the measured pipe outside diameter. This joining method is known as a solvent weld joint, or SWJ.
These couplings are suited to residential, commercial and agricultural irrigation, garden and landscape watering, domestic and rural water supply, pump systems, pool and spa equipment, general water transfer and compatible PVC pressure pipework.