3/4" Noryl Yoke fiber-reinforced polymer Replacement for Fleck Control Valve - Water Softener Accessories Go to amazon.com Related posts Looking for a water softener yoke? Have a look at this 2024 guide! Feature3/4" Description3/4" Noryl (fiber-reinforced polymer) replacement yoke for Fleck brand control valves. The yoke acts as the connection between the tank valve and the plumbing its connected to.