1" Thread to 1" hose barb Elbow $4.99 Default Title - $4.99 Quantity This product is currently sold out. Please fill in the form below if you'd like to be notified when it becomes available. Adapter converts 1" NPT thread to 1" hose barb for connecting ballast hose to intake manifolds. Convert 1" threaded connections from intake manifolds, ball valves, etc. to 1" hose barb for connecting ballast hose.