The flexible tube joint has
a water leakage
 The flexible tubes are not joined
 tightly together.
 Connect the flexible tubes to
 the joint snugly.
 More than one flexible tube size.  Use the correct size flexibletube.
 Aging (rotting) O-ring in flexible
 tubes .
 Replace the O-ring in theflexible
 tube.
Water leakage from the filter
cartridge housing.
 Filter not installed correctly into
 filter housing.
 Remove your filter and reinstall it
 properly following the filter  replacement instructions.
 Increase the quantity of source  water inflow.