I needed to change the basin tap washer. I got a half inch washer out of
an old pack, but I was surprised to find that it doesn't fit. The tap
head has a sort of cup the washer fits into, and the washer is a bit too
big.

I'm pretty sure it's this one:
https://www.toolstation.com/shop/p45674

I suppose the correct washer size might be 3/8"? But then why is it
marketed as 1/2"? And in any case, I don't think the difference is as
much as 25%.

On 12/10/2017 11:56, GB wrote:
I needed to change the basin tap washer. I got a half inch washer out of
an old pack, but I was surprised to find that it doesn't fit. The tap
head has a sort of cup the washer fits into, and the washer is a bit too
big.

I'm pretty sure it's this one:
https://www.toolstation.com/shop/p45674

I suppose the correct washer size might be 3/8"? But then why is it
marketed as 1/2"? And in any case, I don't think the difference is as
much as 25%.

Is it a "cup" with a dimple in the middle? If so you might be in need
of a Barking Grohe Washer which is rounded at the bottom. Eg

https://www.toolstation.com/shop/Plu...+Washer/p77147

https://www.masefield-beta.co.uk/cat...ohe-tap-washer



If so I've sometimes bodgered an ordinary one by shaving the bottom edge
so it fits into the cup. But then I've also met old taps where I had to
shave what purported to be a BG washer because the "cup" was
distorted/corroded. Or it might of course have just been me who was


--
Robin
reply-to address is (intended to be) valid

On 12/10/2017 12:30, Robin wrote:
On 12/10/2017 11:56, GB wrote:
I needed to change the basin tap washer. I got a half inch washer out
of an old pack, but I was surprised to find that it doesn't fit. The
tap head has a sort of cup the washer fits into, and the washer is a
bit too big.

I'm pretty sure it's this one:
https://www.toolstation.com/shop/p45674

I suppose the correct washer size might be 3/8"? But then why is it
marketed as 1/2"? And in any case, I don't think the difference is as
much as 25%.

Is it a "cup" with a dimple in the middle?Â* If so you might be in need
of a Barking Grohe Washer which is rounded at the bottom.Â* Eg

https://www.toolstation.com/shop/Plu...+Washer/p77147


https://www.masefield-beta.co.uk/cat...ohe-tap-washer




If so I've sometimes bodgered an ordinary one by shaving the bottom edge
so it fits into the cup.Â* But then I've also met old taps where I had to
shave what purported to be a BG washer because the "cup" was
distorted/corroded. Or it might of course have just been me who was



There's no dimple. The cup is just smaller than the washer!

I turned the old washer over, and reassembled it. Otherwise, I'd take a
photo.