McAlpine 19/23mm Tunvalve Straight Through (Clear)

"Tunvalve Straight Through (Clear) with 19/23mm Universal Connections This non-return valve may be installed to take the discharge condensate from a boiler, air conditioning unit or cold water cistern when the discharge is being installed into a waste or soil pipe. The non-return valve will prevent foul odour entering the building Must be installed in the vertical position and placed where it is visible for inspection. Not to be used to take the discharge from a Pressure Release Valve (PRV). "