Equipment Leaks are common, usually from wear and tear. The most common types are from:
 
External gaskets
Union seals
Internal gaskets (motor barrier)
Plumbing junctions
Loose Plugs
Multiport lever & spider gasket
 
Initially leaks are annoying, but if left they can worsen, resulting in:
Excessive bubbles & water loss
Loss of prime in the pump
Metal corrosion from spray
Deteriorating filter function
 
Have your case inspected, parts identified and only pay for reasonable labor.