The oxygen tubing Y connector was the item we needed to make the life of oxygen therapy so much more tolerable. I have never been able to use a stationary 5lpm home oxygen concentrator because my flow rate is 6lpm. I have had to use a 10l stationary concentrator. These 10 litres stationary home oxygen concentrators are just defeating. They are so large and so very loud. When my 10 litre stationary home oxygen concentrator needed replacing no one had any stock. I looked everywhere but was told the manufacturer was backordered. When I called Respshop to check on their stock, the Respiratory Therapist explained to me about the Y connector. I could use a 5lpm stationary home oxygen concentrator after all! The Respiratory Therapist explained to me how the Y connector can link two stationary 5lpm home oxygen concentrators together to produce my prescribed flow rate of 6lpm. Respshop changed my life! I am beyond thrilled to have this new set up in my home. Thank you Respshop for your valuable knowledge and experience.