Installing kitchen mixer tap

[tonymackt]

I am just about to install a new mixer tap. I have bought the flexi cable connectors to connect from pipes to tap.

The connectors include an olive and a washer (red plastic).
I have not been able to fit the washer when making the connection.
I have however been able to tighten the connector with olive to tap pipe, checked for leaks and none have occured. Do I need to use a washer for this connection or is the olive sufficient to ensure no leaks for the future.
Appreciate any advise !! thanks

Tony

 

[Bahco]

You do not need fibre washers on compression joints.
Normally used on tap connectors. If no leaks give your self a pat on the back

 

[Newboy]

The washer normally goes between the tap tail and the flexi - a bit unusual if it's a plastic one though