Single Undersink System – SILVER Activated Carbon Filter. Includes: PLV & UPGRADED Chrome Bat Handle Faucet, Opening Spanner Size: 10″ x 2.5″ Ports: 1/4″ Flow: Approx 10Lt/Min using standard Cartridges. Tested To: 120 PSI. We deem 80 PSI to be optimal. Silver Impregnated Carbon is proven to stop the growth of ash/dust fed bacteria. When a cell of bacteria is absorbed, it comes into contact with silver ions. The cell cannot reproduce & dies, reducing the risk of gastro illness by ingesting bacteria.