Should there be a washer on the copper nut thing that i tighten up to
the plastic pipe or not? - I didn't look to see if there was one before
so without taking it back off i don't know.

Yes, there should be a washer. It is probably a 15mm tap connector washer.
It is probably attached to the old valve. You should get a new one anyway,
as the old one will be manked.

Be very careful with metal tap connectors on plastic tails, it is
exceptionally easy to cross thread.

Christian.

"Chris" wrote in message
...
I've had to replace the bottom entry filler system on my WC and i have a
very slight drip which is coming from where the copper nut fixes onto
the threaded plastic inlet pipe.

I used some silastomer sealing compound when I had a minor leak from the threads
surrounding the pipe to the WC. Has the advantage that it sets under water, and
it's been leak-free for many years now.
--
M Stewart
Milton Keynes, UK
www.megalith.freeserve.co.uk/oddimage.htm

Tap connecter washers are fibre redish in colour,not the same as a tap
washer,buy a tube of fernox silicone sealer that may get you out of trouble
with your misthread