On Tue, 26 Jan 2010 14:03:52 +0000, "Nightjar \"cpb\"@"
"insertmysurnamehere wrote:

Dave Osborne wrote:
On 25/01/2010 08:10, Nightjar "cpb"@ insertmysurnamehere wrote:

The theory with fibre washers is that water leaks down the thread to
them, they get wet, swell and seal the connection. The theory with PTFE
tape is that water does not leak down the thread to begin with.

Colin Bignell

Er, I think you'll find that in a tap connector, the fibre washer stops
water leaking down the thread.

I was thinking of a wall mounted tap connector for an outside tap, as
those are what I usually see.

Colin Bignell

Which is a long way from the OP's daughters bathroom situation and as
I said before to somebody the fibre washer in a tap connector doesn't
stop water leaking "down" the thread .