Hello all

The fill valve on my AA S310 has developed a very slow leak.

It's this type:

https://www.bestfittings.co.uk/shop/...-professional/

Before I buy a replacement is there anything I can do to clean or maybe lube it to stop the leak?

The leak started after a gave the nipple a couple of gentle taps with a pin punch to lower the pressure.

Thanks
Matty