[rheavn]

If you saw water under the lid & thought you had a leak, you probably had a vacuum breaker stick or fail to seal.  Unscrew the top of the vacuum breaker.  Under the top is a white plastic check device.  Remove it & clean it.  Remove the calcium from the top which keeps it from sealing.  This is common maintenance that I perform annually to avoid what you experienced---of course I also experienced it.................therefore the maintenance.