This is a replacement Squeeze Ball with Check Valves for the Pro-Fill or Qwik-Fill hand pump.

To replace, remove the old squeeze ball. You may need to cut the tubing away from the barbed connection, remove a minimal amount when cutting. The orientation of the squeeze ball is important. The RED barb points to the water source. The BLACK barb points towards the coupler. Once installed, you are ready to use your hand pump!