John Guest Single Check Valve 3/8 PF x 3/8 PF

This John Guest 3/8 inch Single Check Valve allows water to pass only one way. Ideal if you have a Rotary pump machine connected to Bottled Water. Allows you to disconnect bottled water supply but still retain water in the pump. Otherwise pump will be sucking air when re-connected which can damage Rotary pumps. Perfect for home users caterers and other mobile locations that don't always have access to mains water.