Neoperl PCW-01 Washer Regulator for Shower Hoses

The PCW-01 washer regulator is a washer with dual function: flow regulating and sealing for 1/2" shower hose fittings (with female thread). It's easy to assemble and therefore perfect for retrofit.
A PCW-01 washer regulator offers a simple and inexpensive way to save water and energy in the shower. Furthermore, it maintains an even water distribution where more than one appliance is being used at the same time, as it ensures there is a constant flow rate regardless of pressure fluctuations.