"Existing shower mixer did not have a non return valve, so got this at the same time as a new hose. Hasnt got rubber washers, so got a cheap pack of those as well. Works a treat, and looks a good finish."
"Just a heads up! No problem with valve itself, but buyers should be aware that they will need a rubber washer to retrofit this valve between the shower outlet and the hose, as it is not included in the pack. When fitting this valve you can re-use the original washer taken out of the existing joint for one of the two new joints created, but will need another like it for the other new joint. I'm pretty sure that other shower check valves that I've purchased in the past from other sources have included the necessary additional washer in the pack."