“Residual pressure valve Adapter” has been added to your basket. View basket O2 Union 6mm Y, one-touch€ 6,50 One-Touch (Push-to-Connect), 6mm, Y union. In stock (can be backordered) O2 Union 6mm Y, one-touch quantity Add to basket Categories: Adapters & parts, Oxygen Description Description O2 Union 6x6x6mm Y, one-touch. For use with wider 6mm O2 air tube. Related products Oxygen/Adapters & parts/Mountain High EDSMH Euro DIN-477 #9 Pressure regulator (2G) € 335,00 Add to basket Oxygen/Adapters & partsO2 universal mounting kit from Mountain High € 169,00 Add to basket Oxygen/Adapters & partsResidual pressure valve Adapter € 35,00 Add to basket