15mm pipe 1/2" BSP tap conector won't fit Grohe tap

[d...@gglz.com]

Recently bought Grohe replacement taps (single H & C taps).
Original copper pipework in c. 12 year old new-build house.
Rigid 15mm copper pipes coming up to traditional rigid tap connectors with 1/2" BSP tap connector nuts, and fibre washers.

THE PROBLEM is that these new taps lack the slight recess on the inside of the threaded bore - where the small protruding part of the copper (around which the fibre washers seats) - should protrude slightly into the threaded bore of the base of the taps.

Obvious solution is to fit tap flexi connectors.

But is there such a thing as a suitable washer that would allow the original rigid tap connectors to be used?

(I'm imagining an extra-thick fibre tap-connector washer that is thick enough to get above the slight protrusion on the tap connector)

I'm sure this must be a not-uncommon problem.

[Chris French]

"d...@gglz.com" <d...@gglz.com> Wrote in message:

I'd be dubious about doing that, sounds like it would be asking
for a leak. But are you sure it is 1/2" BSP anyway?

I'm sure I've read that some European taps having a metric fitting?
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Chris French


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[Martin Bonner]

Quick google suggests you need a 12mm connector, not 1/2". Quick search of the Grohe site suggests there should be a flexi tail with the tap.

[d...@gglz.com]

> Quick google suggests you need a 12mm connector, not 1/2". Quick search of the Grohe site suggests there should be a flexi tail with the tap.

I've bought 1/2" BSP tap flexis and they fit, so I think I can be confident about the thread size.

Pity there's no ready solution to getting rigid tap connectors to fit the taps.

[Roger Mills]

The flexis presumably uses flat rubber washers? I suppose you could
grind off the spigots on the on the rigid connectors, and use rubber
washers.
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Roger
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[d...@gglz.com]

> The flexis presumably uses flat rubber washers? I suppose you could
> grind off the spigots on the on the rigid connectors, and use rubber
> washers.
> --
> Cheers,
> Roger
> ____________

Yes - flat rubber washers in the flexis.

And yes, I could probably reduce the spigots in the copper rigid connectors in seconds down below the thickness of the washers - if it were not for them being tight under the washbasin and inaccessible.

Flexis it will be I think.

[Roger Mills]

On 06/02/2016 11:18, d...@gglz.com wrote:
>
>> The flexis presumably uses flat rubber washers? I suppose you could
>> grind off the spigots on the on the rigid connectors, and use rubber
>> washers.

>

> Yes - flat rubber washers in the flexis.
>
> And yes, I could probably reduce the spigots in the copper rigid connectors in seconds down below the thickness of the washers - if it were not for them being tight under the washbasin and inaccessible.
>
> Flexis it will be I think.

Well, you'd have to cut off the existing pipes in order to fit flexis.
So why not cut them off, remove the spigots, and then put them back -
taking the opportunity to re-join them with service valves if you don't
already have any?