$0.75 50079.01.100 Replacement valve for NRS Float Bags. Glue it in the end of hose. Clifton Urethane Adhesive, # 38700.01 and HH-66 Vinyl Cement, # 38711.01 work well. You can also use PVC pipe cement and most versions of super glue. The outside diameter of the portion that goes in the inflation tube is 1/2".