McAlpine Tunvalve Straight Through (Clear) 19/23mm

Can be installed to take discharge condensate from an air conditioning unit, boiler or cold water cistern when the discharge is being installed into a soil or waste pipe. It must be placed where it is visible for inspection and installed in the vertical position. The non-return valve will prevent foul odour from entering the building, and it is not to be used to take the discharge from a pressure release valve.