PVC pressure reducing couplings are PVC-U fittings with a different-size solvent-weld socket at each end. They join two different nominal sizes of PVC pressure pipe in a straight line and provide a transition from the larger pipe size to the smaller pipe size.
Each socket fits over PVC pressure pipe of its matching 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 reducing 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.
