securing a tap to the sink

There will be a nut under the tap - it sandwiches the sink between the nut and the tap. Are you just tightening the nut on the flexible hose?

you will probably need to replace the top hat washer,they often break and are the major cause of loose taps

Look under "backnuts" on

Many sinks come with plastic backnuts that are crap. Change to a brass one and you will be fine.

Adam

Rarely ever see them fitted myself. Flexibles are a major cause of loose taps.

OP - look here

Might be missing a rubber washer, bit of cycle inner tube might do.

Also an extra nut on top of the existing one will help to lock it if the tap does get twisted.

cheers, Pete.

Might be missing a rubber washer, bit of cycle inner tube might do.

Also an extra nut on top of the existing one will help to lock it if the tap does get twisted.

cheers, Pete.

Is the tap knackered and you have to be a bit heavy handed with it? Have yo replaced the wansher and greased the mechanisme - as wll as tighteneing everything underneath as already suggested. Some people are increadibly heavy handed with taps and don't fix the original problem.

Except that often the threads on a brass backnut go right up the the faces of the nut whereas the threads on the tap tail don't, so the brass nut will bind tight while the tap is still loose, unless you have some sort of washer.

thankyou everyone. It has a washer between the tap and the sink. under the sink is a black plastic nut. I can tighten it, but it doesnt stay tightened ! I might add something between the black nut and the sink.

many thanks

Just add a rubber washer between nut and sink, for extra security put another nut on behind the existing one.

cheers, Pete.