Solution: There could be a few problems.
Most commonly, the O-Ring fell out of the handle. Look in the handle and if you don't see the O-Ring, look at where you unscrewed the handle from the bottle and, most likely, it's there on the ground. If you can't find it, order a Complete Nozzle kit from our catalog that includes an O-ring for $3.50 including shipping.
Another reason may be that the large inner tube is not tight. Check to see if it's tight
Check the bottle for cracks in the neck at the threading. To check this; first, make sure there is an O-Ring in the handle. Then fill a sink with water and do not put any water in the bottle and pump it about 20 times. Then submerge the bottle completely under the water and look to see if you see any bubbles coming from the neck. If you do then there is most likely a crack in the neck.Solution: The bottle must be replaced. $5.00 plus shipping from our online catalog.