Why would a tap leak from underneath?

[Anon125]

why would this tap leak from underneath?
yes we checked the aerater and nothing is dribbling down the outside
probable Model: L4625 series
we bought an allen key and took of the top and made sure the grey thing was tight.(see tap bit below)

thanks all

 

[Plumber69]

Get a cup of water from another sink. Pour it slowly around the faucet. I suspect there's no sealent under the faucet so any splashes will find a way underneath.

 

[Sponsor]

 

[Anon125]

we do not see any water around the base of the tap.
thanks

 

[Anon125]

the tap has been there for 14 years, do these sealents dry up?
thanks
tried it, nothing leaked thru then or later, in case it took time to seep thru.
drats!

 

[Cacher_Chick]

The faucet came with a gasket to install between it and the sink.

The cartridge can leak past the stem if it is worn out.

 

[Dj2]

An inspection is needed to see the source of the leak.
I would just replace the faucet...it's easier and with better/quicker results.

 

[Anon125]

well a cartridge is cheaper!
thanks all

 

[Anon125]

somebody said there was a washer missing.
what do you folks think
thanks

 

[Plumber69]

somebody said there was a washer missing.
what do you folks think
thanks

Looks like it. But most the time the washer is still stuck to the faucet