Lift and remove the outer sleeve of the pump a retaining ring will fall out. Wipe the inside of the 4” cylinder until clean using a clean cloth or paper towel. Clean the fixed valve assembly using a clean cloth or paper towel. Inspect the O ring to make sure it is in good shape (replacement O rings available).
Coat the O ring and the inside of the 4” PVC outer sleeve using a light amount of Vaseline.
Assemble the outer sleeve by placing it on the fixed post valve assembly at a slight angel. Use care NOT to pinch the O ring when assembling the outer sleeve. After the valve assembly is inserted straighten the outer sleeve and make sure you have pressure in the downward motion.
To replace the retaining ring view this clip. You are now ready to go.